The RAT WORX HTM “Hybrid Trigger Mod” is a drop-in replacement for AUG and MSAR trigger packs. At $230 (and with an ongoing waiting list) it is the most expensive AUG trigger “fix” I have seen, but it is also by far the best. If you shoot your AUG you should get this trigger pack.
2023 Update: Looks like the evolved version of this excellent enhancement is now the $100 20/20 Precision Trigger Sear Mod.
RAT WORX made the clever design decision to build this upgrade around a standard AR-15 trigger group, which they suggest will allow users to tap the extensive market for AR-15 parts to further customize it. I just put it right in my MSAR and took it for testing.
Trigger weight measured a very consistent 6 pounds. Nominally that doesn’t sound any better than what I found with the Trigger Tamer. But practically there is no comparison: the HTM’s all-metal linkage from the trigger bar through to the sear and hammer eliminates sticking and stacking I couldn’t polish or lubricate out of any previous trigger systems. With this trigger I finally feel confident shooting my MSAR against standard AR-15s. With a 4x optic my test group was able to consistently ring a 200-yard steel silhouette shooting at rates up to 5 rounds per second.
Original thread on the HTM at USAUG.com.
The HTM was an unfortunately limited production by RAT WORX. However: I just noticed that they now offer a Precision Trigger Sear for $100. That looks worth investigating!
The Ratworx sear does not make the trigger pull any lighter, but it does make it a whole lot better.