Slidefire, CMC trigger, light strikes

[stinkysix]

I have looked at all the posts concerning this and I even replaced the firing pin spring with a lighter one and still get light strikes every 5-8 rounds, Thoughts?

Could it be a timing problem, hammer riding bolt to lockup?

 

[Road Man]

I find that my slide fire hiccups if my weak have is too far out on the quad rail. I get a lot more consistent performance when I support the rifle closer to the balance point. Try putting your weak hand close to the magazine well.

 

[97catintenn]

Are you shooting 40gr 1250fps ammo?

 

[stinkysix]

Using several types of ammo all over 1200 fps and I am slightly pushing from the back of the magwell, I have no problem getting it going it just stops with light strikes

 

[robkarrob]

Since you have you tried different ammo, it is an issue of the hammer not impacting the firing pin hard enough to ignite the primer. You've already put in a lighter firing pin return spring. I don't have a lot of knowledge on the CMC trigger, but if you can get the hammer spring out, you can try to reverse bend the spring, so it produces more pressure on the hammer, which might eliminate the light hits. A stronger hammer spring will slightly increase the trigger pull weight, more friction pressure between the sear and hammer.

"hammer riding bolt to lockup" should not be the issue unless the hammer is out of whack with the disconnector. Easy to test, pull the trigger and hold back. Charge the bolt. Slowly release the trigger and if it resets with hardly any forward trigger movement, it may be a poorly timed disconnector. If you have a hard time seeing how far the trigger moves to reset, put a screwdriver or similar between the back of the trigger and the lower. Keep a little rearward pressure on the trigger, with your finger, and apply forward force on the trigger with the screwdriver. You should be able to slowly move the trigger forward and see how much movement it takes to get the reset. Should be 1/16 inch or more.

Bob

 

[97catintenn]

Well, that's the only suggestion I had, Six. Hope someone comes along with an answer.

 

[stinkysix]

Get this, firing single shots semi auto I get no light strikes but with the slidefire every 5-8 shots then a light strike, I think its some type of timing issue. I just thought of something, my CMC trigger has the straight flat trigger, not the curved. Could I be hitting that flat trigger faster with the slidefire than I would with a curved trigger?

 

[robkarrob]

Trigger shape should not matter, as when you get it to run with the SlideFire, it should continue. I have a SlideFire, and do not get light hits often, but do get some and I am sure it is an ammo issue. What I get the most is the run stops, due to either too much or too little forward pressure on the handguard. Have you tried a different brand of ammo?

Bob

 

[stavman11]

Not sure if you have checked this but be sure yer firing pin isnt busted

I was having issues myself... would shoot fine single shot... but wouldnt unload a mag with the slidefire. So decided ta really give it a cleaning job... Turns out the pin was busted on the end.

S&W sent me a return... gave it a nice once over, replaced the pin, and sent it back

So ya may look at that also.

Never had an issue since, my CMC is perfect every time


P.S.

did this just start? or has it always been doing it? Also be sure your trigger pins are straight...