I've decided that I want to run the 3.5 lb. CMC trigger in my 15/22. Any issues with light strikes, should I not go below 4.5 lbs. any questions I'm not asking that I should ? I'm also going with the KNS pins. I've read a lot here and on rimfirecentral and I've pretty much got myself talked into this setup, but hope to avoid issues as much as possible. My less expensive option would be RRA varmint trigger and KNS pins and maybe the yellow JP springs. My use is mostly hunting and shooting holes in paper and other objects that are available. Thanks in advance for any help provided.
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CMC Trigger ?
- Thread starter cinnwalt
- Start date
texmex
Well-known member
3.5 lbs refers to the trigger pull, not the mainspring strength. Should not be any problems with light strikes.
roadkill45
Well-known member
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- Jan 22, 2012
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you won't get light strikes and the CMC has it's own anti walk pins that come with it. C clips on the ends, have never had a problem with them coming off or out and i have the CMC straight trigger in all my AR's.
robkarrob
Well-known member
I find the 15-22 is more sensitive to reduced hammer spring pressure than centerfire rifles. Most aftermarket triggers get their reduced trigger pull with a combination of geometry changes, reduced trigger spring pressure, reduced hammer spring pressure, and polished surfaces. It is the reduced hammer spring pressure, that reduces the hammer impact into the firing pin, and can cause light hits. If the CMC or other brands of aftermarket triggers reduce the hammer pressure by much, light hits could result. I have not used CMC triggers, but I am sure others can advise of their experience with them and of other brands of triggers, and any issues of light hits.
I have changed the stock trigger and hammer springs in my 15-22, using JP light springs, trying to get a lower trigger pull weight. If you get the trigger spring too light (the spring weight can be changed by over/under bending the springs), you can have issues with the spring not being strong enough to get the trigger to move consistently forward, and sometimes won't get the reset. Reducing the hammer spring pressure, which reduces the trigger pull weight by reducing the friction pressure between the hammer and sear faces, can cause light hits. I have got light hits with certain brands of ammo and feel the light hits was not worth the approximate 3/4 pound trigger pull weight reduction. I run the stock hammer spring, with a reduced pressure trigger spring, for my current 15-22 trigger pull weight of 3 1/2 pounds and no light hits. I did lightly polish the sear and hammer contact faces, and I use a light film of anti-seize lube on those contact areas, which helps to reduce friction and lightens the pull. The anti-seize works like the expensive sear lubes.
I have lightened the pull weight on my AR10 and AR15 triggers, like I tried with my 15-22, and had no light hits with them. I did use a lighter hammer spring in them, with no resulting problems of light hits, but as mentioned above, I did have problems with my 15-22 with a lighter hammer spring pressure and went back to the stock hammer spring.
Bob
I have changed the stock trigger and hammer springs in my 15-22, using JP light springs, trying to get a lower trigger pull weight. If you get the trigger spring too light (the spring weight can be changed by over/under bending the springs), you can have issues with the spring not being strong enough to get the trigger to move consistently forward, and sometimes won't get the reset. Reducing the hammer spring pressure, which reduces the trigger pull weight by reducing the friction pressure between the hammer and sear faces, can cause light hits. I have got light hits with certain brands of ammo and feel the light hits was not worth the approximate 3/4 pound trigger pull weight reduction. I run the stock hammer spring, with a reduced pressure trigger spring, for my current 15-22 trigger pull weight of 3 1/2 pounds and no light hits. I did lightly polish the sear and hammer contact faces, and I use a light film of anti-seize lube on those contact areas, which helps to reduce friction and lightens the pull. The anti-seize works like the expensive sear lubes.
I have lightened the pull weight on my AR10 and AR15 triggers, like I tried with my 15-22, and had no light hits with them. I did use a lighter hammer spring in them, with no resulting problems of light hits, but as mentioned above, I did have problems with my 15-22 with a lighter hammer spring pressure and went back to the stock hammer spring.
Bob
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CMC drop in is superb - 3.5lb pull is crisp and the hammer hits hard (have had no FTF in around 1800 rnd of CCI Tactical. As mentioned above, no real need to go with the KNS pins as the drop in comes with its own (my flat blade came with tapped pins and star drive screws). I'm going to knock up a pair of link arms but that's just because I like that look.
Do it - you won't be disappointed - and you'll get it cheaper than we do in the UK
Do it - you won't be disappointed - and you'll get it cheaper than we do in the UK
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Ibmikey
Well-known member
I use CMC triggers in several of my AR's ....really nice FCG. Some how putting a $150 trigger in a $300 rifle is hard for me to accept, especially since both of my 15-22's have decent triggers and mine are not ever going to be match quality rifles. No reason why a CMC would not drop right in though and would be sweet shooting.
stavman11
Well-known member
Love my CMC trigger... I also have a Timney... I was so surprised at how hard the CMC hammer hits.... Pinched my finger 1st time I tested it
I have never had a light strike with the CMC, i did with the Timney, only issues i had was related to a busted Firing pin..
3.5 CMC all the way
I have never had a light strike with the CMC, i did with the Timney, only issues i had was related to a busted Firing pin..
3.5 CMC all the way
