I bought a CMC trigger for my 15-22 and they come with specific pins and screws for a 15-22. Do I also need the KNS anti roll pins or good to go with the CMC stuff? It is a range toy, mostly. Thanks.


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Your good to go.

You use EITHER the supplied pins, OR KNS anti roll pins, whichever you prefer.

With many (most? all?) drop in fire-control groups, 'standard' pins will not work because there is no disconnect spring/j spring for them to index on. Thus, they will 'walk' (actually slide out very freely) unless they are held in place somehow.

The CMC fire control group that I received when I got a slide fire stock uses c clips to retain the hammer and trigger pins, while the KNS use screws and a linkage (sounds like your CMC FCG also came with screws and a linkage).

For what it's worth, I've found the c-clips to be a PITA, both to put on and to remove.

Regardless of what pins you use, you will need to get the pins specifically made for the 15-22 as the frame is SLIGHTLY wider than a mil-spec AR-15 lower receiver, meaning that the pins are SLIGHTLY longer than mil-spec pins.

HTH..

I think these are the pins I'm getting: CMC Triggers Anti-Walk Pin Set for M&P 15-22 & all Composite Lowers - Pin Sets - Products | CMC Triggers


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My CMC trigger for my 15-22 came with the pins and screws and fit perfect, ended up about a 3 lb trigger

It says that some polymer lowers may require fitting on the Cmc trigger. Does it just drop in on the 15-22?

mine was just a drop in, a few minutes to change out

Same experience as JeffM, installs in minutes and just dropped in with 2 different rifles.