M&P 15-22/RRA NM Trigger Issue

MDMOUNTAINEER · Sep 17, 2012

So, I bought a NM for my MP-15-22. I install it today and it's not working. The trigger appears to travel through the first stage but the selector stops it before it can go through the second stage and disengage the sear. The hammer is effectively locked in place.

I tried with both the NM supplied pins .155 and the stock .154 pins. No dice. I put the NM in a real AR and it works fine. I checked center to center on the pin holes in the receiver and they are the same as a standard AR. The selector is OEM as installed at the factory. The trigger body is not getting hung up on the "ears" of the selector.

I tried to call RRA today and their line was busy. Anyone have any advice?

BradMacc82 · Sep 17, 2012

Honestly..., pitch the RRA and get a Geissele -

Reason I say that is 2-folds.

1st - No comparison between the two, the Geissele is just that much nicer. I tossed my RRA NM after getting the SSA-E, not even sure where it is now.

2nd - Crazyal runs the SSA-E in his .22 AR's, and they just run, no issues.

MDMOUNTAINEER · Sep 18, 2012

BradMacc82 said:
Honestly..., pitch the RRA and get a Geissele -

Reason I say that is 2-folds.

1st - No comparison between the two, the Geissele is just that much nicer. I tossed my RRA NM after getting the SSA-E, not even sure where it is now.

2nd - Crazyal runs the SSA-E in his .22 AR's, and they just run, no issues.

That's a fantastic idea, I'll just throw this $100 trigger away and spend another $200 on a different trigger, that way I'll have as much invested in triggers as the gun itself costs.

I can't believe I didn't think of that. Very insightful Brad.

lx1x · Sep 18, 2012

BradMacc82 said:
Honestly..., pitch the RRA and get a Geissele -

Reason I say that is 2-folds.

1st - No comparison between the two, the Geissele is just that much nicer. I tossed my RRA NM after getting the SSA-E, not even sure where it is now.

2nd - Crazyal runs the SSA-E in his .22 AR's, and they just run, no issues.

if the rra doesnt work on the mp15-22 and works on the regular ar.. something else is wrong with it.

justin,

maybe replace the selector with another and try it again??

MDMOUNTAINEER · Sep 18, 2012

lx1x said:
if the rra doesnt work on the mp15-22 and works on the regular ar.. something else is wrong with it.

justin,

maybe replace the selector with another and try it again??

I should have added that I swapped the selector too and that didn't help. The MP lower must be out of spec a couple of thousandths. That's what it's gotta be. I just wanted to be sure that I'm not missing something else.

lx1x · Sep 18, 2012

tss1004 said:
I should have added that I swapped the selector too and that didn't help. The MP lower must be out of spec a couple of thousandths. That's what it's gotta be. I just wanted to be sure that I'm not missing something else.

maybe just the floor/depth in that trigger area of that mp is not the same dimension of an ar.

mdoffroad · Sep 18, 2012

Sounds like youhave another issue. I swapped a Spikes nickel boron trigger into my 15-22 and it works like a charm for $75

BradMacc82 · Sep 18, 2012

You asked for advice..., I gave some. :shrug:

clandestine · Sep 18, 2012

Most aftermarket Safeties are not suitable for M&P 15-22's without some fitting in my experience.

RRA 2 Stage Triggers dont always drop in, some need fitting. I dont like RRA Triggers at all, If yours is notched it wont work on the .22 anyway, it will catch on the Bolt.

mdoffroad · Sep 18, 2012

The reason most safties dont work (I was lead to beleive) was the 15-22 had a thicker lower than a standard AR. Just post your trigger for sale and buy one ya know fits!

Oh, its its a 2 stage, RRA doesnt recommend them for the 15-22, something about breakage..not sure, didnt buy one

CHUNKERMD · Sep 18, 2012

I put a Wilson Combat ss trigger in a M&P 15-22 without any issues, fwiw.

MDMOUNTAINEER · Sep 18, 2012

BradMacc82 said:
You asked for advice..., I gave some.

I know buddy, but I was looking for advice on how to make what I got work.

I really did mean my post tongue-in-cheek not really to offend

mdoffroad said:
The reason most safties dont work (I was lead to beleive) was the 15-22 had a thicker lower than a standard AR. Just post your trigger for sale and buy one ya know fits! Oh, its its a 2 stage, RRA doesnt recommend them for the 15-22, something about breakage..not sure, didnt buy one

It's my understanding that the S&W performance center MP-15-22's come with a RRA NM trigger. Oh well, back to stock she has gone

MDMOUNTAINEER · Sep 18, 2012

clandestine said:
Most aftermarket Safeties are not suitable for M&P 15-22's without some fitting in my experience.

RRA 2 Stage Triggers dont always drop in, some need fitting. I dont like RRA Triggers at all, If yours is notched it wont work on the .22 anyway, it will catch on the Bolt.

Mine is round, I guess I could try to fiddle with the trigger some. But then again, I'll probably just put it in the parts bin.

BradMacc82 · Sep 19, 2012

It's all good man, no butt-hurt here.

FWIW - The RRA pack I had wouldn't work in 2 separate lowers I tried it in, then a fellow shooter put me onto Geissele, and I never looked back.

If you can recoup what you spent on the RRA, look at ALG(?) - it's Geissele's wife's company, they're only $40 more, and supposed to be pretty good.

atomics20 · Oct 12, 2012

I just did a trigger job on my m&p and its feels great. I can only imagine how it must feel with a new group

M&P 15-22/RRA NM Trigger Issue

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