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M&P15-22 & RRA 2-Stage NM Trigger
I didn't much care for the 7lb single stage trigger in my M&P15-22 so it was time to do something. Ibriefly considered a Geissele SSA but instead my wallet settled on Rock River Arms 2-Stage National Match trigger and wow what a difference. It's no Geissele but then again it was just over 1/2 the price of an of a Geissele SSA. The Geisseles in my AR15s have a 2lb 1st stage and a 2-1/2lb 2nd stage for a smooth 4-1/2lb trigger that feels like a crisp 2-1/2lb trigger 
. My RRA has a smooth 2-3/4lb 1st stage and a crisp 3-1/4lb 2nd stage for a total of 6-1/4lbs that feels like a crisp 3-1/2lb trigger . It's a huge improvement over the factory trigger! The durability of RRA National Match triggers is an open question (reports vary from good to awful) but it's not like I'm going to parachute into combat with the M&P15-22. 
If you've never used a 2-stage trigger there is a long take-up and then you hit a wall - the second stage. Move the trigger any more and it fires and because of the way the brain perceives pressure you only notice the weight of the 2nd stage. The idea is to have the safety of the total pull weight with the precision feel of the much lower 2nd stage pull weight.
Installation was almost drop-in with no fitting or modifications required. Gently lower the hammer and remove the pin holding the old hammer in place using a 1/8" punch. Next remove the old trigger the same way. Lube the new pivot pins with light grease and install the new trigger (drops right in) and the new pivot pin. Then install the hammer under tension with legs to the rear and hold it in place with the the punch while you get the pin in. All that's left to do is test the trigger and the safety. I rest my thumb lightly on the hammer and carefully catch it to save dry fire wear and tear.
I have not been to the range yet and can't go before Thursday or Friday but I'll followup with how it's shooting then.
. My RRA has a smooth 2-3/4lb 1st stage and a crisp 3-1/4lb 2nd stage for a total of 6-1/4lbs that feels like a crisp 3-1/2lb trigger . It's a huge improvement over the factory trigger! The durability of RRA National Match triggers is an open question (reports vary from good to awful) but it's not like I'm going to parachute into combat with the M&P15-22. If you've never used a 2-stage trigger there is a long take-up and then you hit a wall - the second stage. Move the trigger any more and it fires and because of the way the brain perceives pressure you only notice the weight of the 2nd stage. The idea is to have the safety of the total pull weight with the precision feel of the much lower 2nd stage pull weight.
Installation was almost drop-in with no fitting or modifications required. Gently lower the hammer and remove the pin holding the old hammer in place using a 1/8" punch. Next remove the old trigger the same way. Lube the new pivot pins with light grease and install the new trigger (drops right in) and the new pivot pin. Then install the hammer under tension with legs to the rear and hold it in place with the the punch while you get the pin in. All that's left to do is test the trigger and the safety. I rest my thumb lightly on the hammer and carefully catch it to save dry fire wear and tear.
I have not been to the range yet and can't go before Thursday or Friday but I'll followup with how it's shooting then.
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