Category Archives: Arms

1911-style Pistols

Sig Nightmare, Springfield TRP, Carry Nightmare, P220 Combat

Shown here are four autoloading pistols chambered for the .45 ACP cartridge. Three are incarnations of the 1911, and bottom right is one alternative I consider superior to that design: The Sig P220 (this one a “Combat” edition with an extra $150 of anti-corrosion coatings). On the left are Sig Sauer’s $1200 Nightmare and Nightmare Carry variants of the 1911. Top right is the Springfield TRP, a near custom-grade 1911 that costs almost $1800.

John Browning’s 1911 pistol is a historic firearm, made even more remarkable by the fact that the century-old design is still considered competitive with the most modern handguns on the market. It is not uncommon to see custom-tuned 1911s selling for $2000-$3000. The high end of the custom 1911 market exceeds $5000. I will admit that a hand-finished 1911 can be a beautiful machine: a reliable, durable, precise pleasure to shoot.

But I find a few drawbacks to the 1911. The first is that you have to really pay up to get a 1911 that equals the fit and finish of the $1000 P220 I show for comparison. (See my praise of the Sig Sauer P22x series here.) Even these more expensive Sig Nightmares exhibited out-of-the-box stickiness in trigger pull and operation that left me feeling like they needed to be cleaned and polished, or maybe more broken in. The Springfield TRP, on the other hand, provided the slick, transparent handling I have only briefly experienced with other (even more expensive) custom 1911s.
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I Like Sig Pistols

My top choice for autoloading pistols are Glocks. However when money is not a dominant factor I have become enamored of Sig Sauer pistols. (With night sights they start around $1000, vs $600 for Glocks.)

Sig P226 German, P229R Elite Dark, P226 Scorpion, M11-A1

Shown here are four classic DA/SA pistols chambered in 9mm (but also available in .357 SIG and .40 S&W). On the left are the full-sized P226 German and P226 Scorpion, with standard 9mm magazine capacities of 15 rounds. On the right are the mid-sized P229 Elite Dark and M11-A1, with 9mm magazine capacities of 13 rounds. All have SIGLITE night sights.

Top Left: The P226 German is hard to find here since Sig has been making pistols for the U.S. market at its Exeter, New Hampshire facility for years. Apparently the German plant uses some different methods to manufacture the slide. Practically I can’t see any differences with a standard P226. This specimen also features Hogue anodized aluminum grips, which are my personal favorite.

Top Right: The P229 Elite Dark adds a beavertail frame, SRT trigger, Hogue aluminum grips, and front cocking serrations to a regular P229.

Bottom Left: The P226 Scorpion is a P226 Elite finished in Flat Dark Earth. Grips are Hogue G10.

Bottom Right: The M11-A1 is a P229 built for the military. It features the Sig Anti-Snag (SAS) frame and phosphate-coated internal parts to increase corrosion resistance.

The common attractions of this line of pistols are the following:

  • They are available with Sig’s Short Reset Trigger (SRT), the best factory pistol trigger I have ever tried.
  • Their metal frames and slides fit and run like a fine watch. Trigger aside, there’s something sublime about the feel and finish that sets them in a class above guns with polymer frames and triggers.
  • They have no manual safety, which I consider an unnecessary complication in a defensive pistol.
  • Reliability is top-notch, as their numerous contracts with the most demanding government buyers attest.

I went into the DA/SA trigger system in detail in my recent post on the Sig P239. To summarize: The pistol is carried loaded and decocked. The first trigger pull is a long but smooth ten-pound double-action that first cocks and then releases the hammer. The DA trigger pull is the pistol’s “manual safety,” which can also be “disengaged” by manually cocking the hammer. From that point until the pistol is manually decocked the trigger has a precise 4-pound break with minimal overtravel and reset.

Physics of Gun Energy, Recoil, and Range

Yesterday’s post highlighted one gun cartridge (the .357 SIG) that, in small pistols, delivers energy disproportionate to its recoil. Today I will describe more generally the physics and practical considerations that go into optimizing a gun for a particular purpose.

The purpose of a gun is generally to project some combination of Energy, Range, and Accuracy.

Today this is done with firearms, which are subject to practical constraints on Length, Cartridge Size, Chamber Pressure, Rifling, and Recoil. Cartridge Size is a function of propellant (gun powder) capacity and projectile (bullet) size. To understand the physics that relate all these variables we will actually start with a Cartridge and work backwards, because:

A. Propellant volume puts an upper limit on the Kinetic Energy a gun can generate.

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Sig P239 Pistols

The P239 is the sub-compact variant of Sig Sauer’s classic full-power autoloading pistol, making it a great deep concealment or backup gun.

Sig P239s in 9mm and .357 SIG

On the right is a ten-year-old standard P239. On the left is a recent “Tactical” variant, which includes front serrations on the slide and Sig’s Short-Reset Trigger (SRT). This one also has an extended barrel threaded for a suppressor, which increases the barrel length from 3.5″ to 4″. Both pistols are equipped with SIGLITE night sights. (Illuminated sights are essential for any pistol that might need to be used in low-light conditions, as defensive arms so often are.)

Calibers

The P239 is available in 9mm, .357 SIG, and .40 S&W. The left pistol is chambered in 9mm, allowing it to carry 8+1 rounds vs 7+1 in the pistol on the right, which is shown in .357 SIG. Switching calibers is only a matter of changing the barrel and recoil spring, and putting in the correct magazine.

.357 SIG, though not as popular as the other two calibers, is uniquely appealing. A typical defensive load for the 9mm is a 125gr bullet. Loaded to +P specifications it will leave a 3.5″ barrel at about 1200fps. The .357 SIG fires the same bullet at 1400fps. A typical .40 load is either a 150gr bullet that reaches 1200fps or a 180gr that attains 1000fps.

Many of the arguments over defensive calibers are anecdotal, and in that domain people who have to shoot a lot of animals consider the .357 SIG to be a more reliable stopper than the slower alternatives here. Higher velocity also seems to offer some resistance to deflection and assistance to barrier penetration, though the nuances vary largely with the bullets and materials being shot. Nevertheless, there are two objective metrics that everyone agrees on: (1) Kinetic Energy, which determines the maximum amount of damage a bullet can do, and (2) Momentum, which is proportional to recoil, which determines how difficult it is for a shooter to control the gun and make accurate follow-up shots. While Energy continues to be quoted in foot-pounds, the shooting industry has adopted a measure of momentum called “Power Factor,” which we will use here:

Load Velocity (fps) Energy (ft-lbs) Power Factor
9mm+P 125gr 1200 400 150
.357 SIG 125gr 1400 544 175
.40 150gr 1200 480 180
.40 180gr 1000 400 180

The .357 SIG is a clear standout for a short-barreled pistol like the P239: Of the available calibers it offers the highest velocity and energy without exceptional recoil. However, it is not as widely available as the other two calibers. Also, 9mm is significantly cheaper and can squeeze one more round into each magazine. If I were on a budget and wanted to do a lot of practice I would probably use 9mm at the range and switch the gun back to .357 SIG for protection.

Triggers

Sigs are fine pistols. The examples here cost about $1000 each. The fit, finish, operation, and reliability of these guns are superb.

The classic Sig Double-Action/Single-Action (DA/SA) trigger system offers some unique features. These pistols are designed to be carried with the hammer down. In that condition the first pull of the trigger is a long and heavy (about ten pounds) double-action that serves to cock and then release the hammer. After the first shot the hammer is cocked and the trigger performs the single action of releasing the hammer (with just over four pounds of pressure). When the shooting is over the decocking lever (second on the left side) lowers the hammer, rendering the gun safe to holster. I.e., the gun’s “manual safety” is the double-action trigger pull. That “safety” can also be disengaged by manually cocking the hammer when the gun is first drawn.

The single-action trigger pull and reset are superb. The standard trigger takes about half an inch to reset. From there it is slack until pulled back to the sear release point, where it breaks and stops crisply. The SRT, standard on the Tactical and an easy $50 upgrade on any other model, takes the trigger to a level I previously thought existed only on custom-tuned 1911s: The SRT resets in little more than an eighth of an inch, and there is no discernible slack after the reset. This allows a shooter with a properly disciplined trigger finger (i.e., one that doesn’t unnecessarily release or jerk the trigger) to fire shot strings with only minimal finger movement.

CQB Rifle Optics

RFB with EOTech and Primary Arms 6x QD Pivot Magnifier

Not long ago if you wanted to carry more firepower than a pistol, but you wanted something more wieldy than a rifle, you would carry a sub-machine gun. Typically equipped with folding or collapsing stocks and extended magazines, these could put more rounds on a target more quickly and accurately than a handgun. But sub-machine guns shoot handgun rounds, not rifle rounds, and even before the ubiquity of body armor the ability of the former to penetrate barriers and stop bad guys was a known shortcoming.

Today sub-machine guns are tactical relics, replaced by a smorgasbord of rifles with short barrels, folding stocks, and (my favorite) bull-pup configurations like the Kel-Tec RFB shown here. These are almost as easy to carry and maneuver in close quarters as sub-machine guns, but they shoot the full-power rifle rounds you’d much rather send towards a bad guy or vehicle when your life depends on it.

When I tested the Kel-Tec RFB I mounted one of my high-power scopes so that I could wring out its full potential for accuracy. Since it shoots the mid-range .308 round it wouldn’t be unreasonable to equip it that way, but since it is also proportioned for close-quarters battle I wanted to test some CQB-appropriate optics.
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Future Firearms: From Ballistic to Optical

Those who study the art of precision shooting know that today a good marksman will easily spend 5 figures on equipment, thousands of hours of practice and development, and at least a dollar per shot. All this with the singular objective of being able to project a few kilojoules of energy up to a mile or so away as quickly and accurately as possible.

Today the tool of the trade is the rifle: essentially a tube that converts chemical energy from a gunpowder-fueled cartridge into the kinetic energy of a spin-stabilized bullet. Riflemen go to great lengths to maximize how precisely they can get this machine to project a bullet into the atmosphere. But under field conditions accuracy is limited to about half a minute of arc (i.e., half an inch of error per 100 yards distance from a target). The physics of atmospheric ballistics require heavier equipment to reach further distances, and put the outer limit of a man-portable rifle’s range at about 1.5 miles.

Thanks to evolutionary advances in optics, ballistics, firearms, and cartridges, the capabilities of riflemen have never been greater. But the whole art seems somewhat archaic.

In time precision rifles will go the way of blackpowder muskets, replaced, I suspect, by optical firearms. This may at first sound like trite science fiction — am I seriously writing about the advent of rayguns? Well yes, but consider how and why this wouldn’t be as revolutionary as it sounds: The first optical firearms will probably fire chemical lasers.

Current single-shot chemical lasers are roughly 30% efficient at converting chemical energy into optical energy. They require supersonic mixing of reagents and generate a lot of heat. Current rifles are also about 30% efficient at converting the chemical energy of smokeless powder into supersonic kinetic energy, and also generate a lot of heat. From this point on optical firearms take the lead: A ballistic projectile begins to lose energy and accuracy due to atmospheric interactions from the moment it leaves the barrel. Optical energy follows a line of sight at the speed of light and loses energy only to the degree that its wavelength is dispersed by the atmosphere through which it travels.

Chemical laser firearms could be similar to current rifles in many ways. They will probably employ a single cartridge per shot containing not only the chemical reagents but also an explosive “primer” to mix them when fired. Instead of projecting a bullet into a rifled barrel for acceleration, the cartridge will project the mixture into an optical cavity where mirrors and lenses will focus the flash of high-powered light out the muzzle. Depending on the particular technology the reagents may leave the gun like a muzzle blast, or stay in the cartridge for ejection. Optical cartridges could be reloadable by shooters, just like ballistic cartridges.

So where’s the sport in that? If you can see it you can put a hole in it? As now, a lot of the critical cartridge development will be done by professional chemists at propellant manufacturers. Gun makers will be mostly replaced with the manufacturers who are already making the rugged, precision glass for 4-figure riflescopes. Perhaps marksmen will switch their focus to tricks for pushing the diffraction limit with man-portable optics to further range and accuracy?

SCAR 17S

SCAR 17S FDE with MIAD grip and Nightforce 3-15x40mm scope

After spending some time with this SCAR 17S I have a few salient observations. If you’re looking for a complete review start here or here.

Overall the FN SCAR 17S is an overpriced but good 4th-generation “heavy” tactical rifle. SCAR stands for Spec-ops Combat Assault Rifle, a procurement project developed by US SOCOM almost a decade ago that ultimately resulted in a production contract for FNH. The 17S is a semi-automatic version of the reliable SCAR-H being produced for the military. “Heavy” refers to the rifle’s caliber, not its weight: At 8 pounds it’s actually quite light for an auto-loader that shoots the mid-power 7.62x51mm NATO round.

Typically this combination of a light gun shooting heavy rounds is a recipe for jarring recoil that makes fast follow-up shots impossible. But the SCAR 17S does a remarkable job taming recoil: In addition to a very effective muzzle brake its massive reciprocating action has been tuned to dampen the recoil impulse to such a degree that it can be fired accurately as fast as a 5.56mm carbine.

Like most 4th-gen tactical rifles the SCAR has a piston action, monolithic upper, folding stock, short-throw safety, and ambidextrous controls (except, strangely, for the bolt catch). It can be field-stripped without tools. Barrels can be changed out with a torque wrench.

Many of my complaints about this gun are based on its price: Almost $3000. This puts it in the realm of custom-tuned AR-10 rifles which, though heavier and lacking in 4th-generation features, are capable of far greater accuracy. Out of the box the SCAR 17S comes with a trigger that is absolutely awful. In fact we abandoned our first range trip to test its accuracy after realizing the trigger was too sticky and heavy to approach 1 MOA. After upgrading to a Timney drop-in trigger we were able to shoot about 1 MOA with match-grade ammo.

The SCAR stock and lower are made almost entirely of polymers. For the price one would expect a decent grip, but it ships with a bottom-of-the-barrel A2-style plastic grip. Compounding this annoyance is the fact that it does not quite fit standard AR grips. We tried an ERGO grip sized specifically for the SCAR, but that had too much flex to positively control the rifle. So we resorted to what many SCAR owners apparently do: filing and Dremeling a true AR grip to fit. (In this case a Magpul MIAD.)

Another annoyance is the fact that it does not work with standard AR-10 or FAL magazines, but rather requires magazines that only fit the SCAR 17S.

SCAR 17S FDE color, left side

For me a potential deal-breaker is the fact that the 17S has a reciprocating charging handle. In principle I don’t think a reciprocating handle belongs on unmounted guns. There are plenty of support positions that can interfere with the movement of that handle during firing. For example, the first time I raised the gun to shoot offhand, with the magazine well tucked into the web of my support hand, the charging handle hit my thumb. Fortunately the recoil impulse is slow enough that it doesn’t seem likely to break anything, but if I want to use that stance I would have to switch the handle to the other side and operate the action with my trigger hand.

Desert Tactical Arms Stealth Recon Scout Rifle

DTA SRS Covert with IOR and Cyclone

Desert Tactical Arms currently makes the only bolt-action bullpup rifle available in the U.S. Given my love of the bullpup style I was excited to find them, until I saw that their prices start at over $4000. I said, “No way; I’ll wait until someone does it cheaper.” A year went by with no signs of anyone moving to compete in this niche. I did some more research, found a dealer selling them at a 20% discount to retail and, as you can see, finally convinced both myself and a friend to pull the trigger. Pictured here is my SRS Covert (the shorter one) in Olive-Drab Green and my friend’s full-length SRS in Flat Dark Earth.

DTA SRS and SRS Covert
(Of course once you spend $4000 on a rifle you don’t want to cut corners on the scope: Mine carries a $1700 IOR Valdada 6-24x56mm FFP. The other wears a $2200 NightForce 3.5-15×50 FFP.)

The Covert chassis is the bare minimum 26″ in overall length, and is equipped here with a 16″ barrel chambered in .308 with a 1:8 twist — optimal for running subsonic loads as well as the heaviest .308 bullets. The standard SRS has an extended fore-end that pushes it to 32″ long, and is shown here with a 22″ .308 barrel, 1:11 twist.

These rifles are supposed to compete not only in price but also in performance with the finest precision bolt guns on the market: Accuracy International, G.A. Precision, Sako, Surgeon, and higher-end custom sniper rifles.

The DTA SRS has some remarkable features (in addition to the bullpup configuration I love for its compactness):

  1. Quick-change caliber conversion: Using a single torque wrench a barrel can be swapped out in under a minute and replaced without losing zero.  The chassis accommodates conversion bolts and magazines to cover calibers from .243 Win up to .338 Lapua Magnum.
  2. The trigger is the finest I have ever pulled.  It is a single-stage design and is adjustable for creep and weight.  I have mine turned down to 1.5 pounds.  (Granted, I don’t have trigger time on the competition, and many shooters who do claim that Sako and AI triggers are better.  Many also lament the lack of a second stage and adjustable stop.)
  3. All DTA barrels are match-grade Lothar-Walthers.  The rifles have developed a reputation for world-class long-range precision.
  4. Quick-Detach sling mounting points are included everywhere you might want them.

There are some fundamental shortcomings:

  1. The bolt assembly — essentially the only mechanism on the gun that has to move — has a matte finish.  It should have a high-lubricity coating.  I paid ROBAR $65 to coat mine in NP3.
  2. The single-stack magazines are made to very loose tolerances and, given their construction, are absurdly expensive.  DTA charges over $100 for a part that it appears they haven’t spent more than $15 to make.
  3. The butt is hard, and there is no means of adjusting the comb.

Another drawback is that the company is still immature.  I wouldn’t expect sloppiness like the following given the price they are charging:

  1. My barrel arrived with copper fouling.  (Hopefully only “tested,” not “used.” DTA claimed that after test-firing barrels they don’t clean them in case customers want to run the break-in rituals that high-end barrel makers eschew.) [Update: I actually couldn’t get it to shoot under 1.5MOA, and after several range sessions to eliminate any other sources of error returned it. It took them a month, but they finally sent me a new barrel that shoots .5MOA with factory match ammo.]
  2. To date they have included a “test target” with every gun that is just a photocopy of one shot earlier in the year on a different gun and in a different caliber.
  3. They have a few good service agents, but also some very incompetent ones.

Subsonic .22LR Terminal Ballistics and Lethality

.22LR is the smallest firearm cartridge in common use today. Common wisdom holds that it is too weak to use for defense against humans or for hunting any animal larger than a raccoon. However there is some evidence that this cartridge is underestimated.

.22LR ammunition is attractive for several reasons:

As I have noted elsewhere, it is a great round for shooting with suppressors: Because .22LR produces so little propellant pressure and volume, suppressors for the caliber can be made very small and light. Furthermore, there is an abundance of subsonic loads on the market, which allow for nearly silent shooting: When shooting slower loads out of my rifles with an Outback suppressor the only audible sound from the gun is the click of the sear releasing the hammer and striking the cartridge rim. The sound of the lead projectile striking a soft target even a hundred yards away is louder to the shooter. (Note that in moderate weather muzzle velocity has to fall below 1000fps to avoid sonic echoes, which increase in loudness and turn into unmistakable sonic cracks as muzzle velocities cross the speed of sound around 1100fps.)

Guns I have reviewed in this caliber include:

So this is a cheap, fun, and accurate caliber. But is it useful for hunting or defense? This is a subject of endless debate. When it comes to defense, of course, we would prefer to avoid confrontation altogether, and failing that would grab a high-powered rifle or shotgun to stop any aggressor. Smaller guns and lighter rounds are a compromise: you sacrifice power and penetration in order to get something more portable and shootable.

Effects on Humans

Common wisdom has it that .380ACP is “barely” enough bullet to qualify as a defensive handgun round, and anything lighter is more likely to enrage an aggressor than to stop him. My favorite study of this subject is An Alternate Look at Handgun Stopping Power by Greg Ellifritz. He analyzed nearly 1800 shootings during violent encounters and came up with some surprising results:

  1. A lot of the time just shooting at someone is enough to get them to stop, regardless of caliber or whether they are hit. I.e., guns “psychologically stop” many assailants. Based on this observation: It’s more important to have a gun – any gun – than to be caught without one.
  2. Determined aggressors do need to be “physically stopped” (incapacitated), and in that case shot placement is far more important than caliber. I.e., largely regardless of caliber: if you hit an assailant in the head they stop 75% of the time. Torso hits stop them 40% of the time. Put another way: How well you shoot is more important than what you shoot.
  3. However, independent of shot placement, calibers below .380ACP are twice as likely to “fail to incapacitate” as the larger calibers. So yes, there is something to the conventional wisdom that if you’re carrying a gun it should shoot something no smaller than .380ACP.

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Primary Weapons Systems PWS T3 Summit Toggle Action .22LR Rifle

Here is a subsonic target rifle I built on PWS’s new T3 Summit rimfire toggle action:
PWS T3 with Hogue stock and Outback II suppressor

I acquired the T3 receiver and trigger assembly, shown below, for $500. The beautifully machined bolt and receiver are proprietary, but everything else is compatible with the broad market of Ruger 10/22 accessories. The trigger assembly features a crisp 2.5-pound trigger, and is all metal except for the trigger itself and the convenient extended magazine release lever in front of the trigger guard.
PWS T3 receiver and trigger assembly

I installed the receiver in a Hogue stock. The 18″ barrel came muzzle-threaded from EABCO and button rifled with a 1:9 twist rate: sufficient to stabilize subsonic 60gr Aguila .22 bullets. (The standard .22LR twist rate is 1:16.) Those two components brought total cost for the gun to $750, excluding a scope.
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