The UK's Finest Independent Forum for Shooters and Gun Owners. Est 2010.

my cmmg rifle has been giving me light strikes on and off since I bought it new tryed everything else so I'm hoping a new firing pin will sort it.

I know I know should have bought an M&P I starting to wish I had of.

Our club's CMMG's constantly have firing pin problems and several of them have broken and had to be replaced.
At least we have a few 10 22's which are at least reliable.
Other club members have also had problems with the firing pins it appears to be a common theme.

Hunter87 wrote:my cmmg rifle has been giving me light strikes on and off since I bought it new tryed everything else so I'm hoping a new firing pin will sort it.

I know I know should have bought an M&P I starting to wish I had of.

Do you still have the BHOA fitted, was it fitted to the gun as per the instructions?

Are the springs in good order?

Is the FWD assist block still fitted?

Is the gun run dry, moist (oo-er), wet?

I ask because my CMMG has been fussy as feck to get going but since I bothered to read the instructions regards BHOA and then finally stopped using the FWD assist block - it's been utterly flawless this last year or so.

Must confess: Mine has the TACCOM enhanced extractor fitted about 12 months ago too (broke a piece off the original).

This might be worth a look if they're back in stock: http://www.suffolkrifle.co.uk/shop/tacc ... iring-pin/

or perhaps the bolt rehab kit: http://www.suffolkrifle.co.uk/shop/cmmg ... rehab-kit/

Yes to all your question the rifle was lubed but not to excess it was even there "improved" version

I re-profiled the pin on mine after I got it 3 years ago, I was getting misfires straight out of the box, mine just seemed to be too fat and wasn't hitting with enough force due to the large surface area. After shaping it to be about the same as my other .22's I haven't had a problem since.
Just be aware not to make it like a chisel, you don't want to pierce the cases!

Hunter87 wrote:my cmmg rifle has been giving me light strikes on and off since I bought it new tryed everything else so I'm hoping a new firing pin will sort it.

I know I know should have bought an M&P I starting to wish I had of.

when you buy a brand new gun as expensive as it is for a .22lr you shouldn't have to home gun smith it to work reliably

farmer7 wrote:I re-profiled the pin on mine after I got it 3 years ago, I was getting misfires straight out of the box, mine just seemed to be too fat and wasn't hitting with enough force due to the large surface area. After shaping it to be about the same as my other .22's I haven't had a problem since.
Just be aware not to make it like a chisel, you don't want to pierce the cases!

I was only offering an alternative to a new pin which if the same shape as mine was originally won't help you with the misfire problem. It only takes a few minutes.

Yeah I agree entirely - but to be fair, every last one of my brand new guns has given me some kind of problem, my aged "battle" rifles bought second hand have been absolute perfection (in terms of reliability).

I guess we just get used to pi55 poor performance of our semi autos, because lets face it - theres too many box shifting RFD's and not enough gun smiths to get then running right.

I love my CMMG (now) but if Lantac had been dealing in them and fettling them again at the time I got mine - that's where I'd have bought mine from.

I'm on my 2nd CMMG rifle and the only issue I ever had was with the FA insert that rides on the back of the bolt. When I got my 2nd CMMG I took it out straight away, because they do wear out and it's an expensive spare for what it is.

The one thing that you can and should do with a CMMG is to remove and clean the firing pin. The firing pin spring can get a bit gunged up with residue and oil, especially if you run a mod.

Both mine and BamBams gun are from the same run as yours.

No problems with light strikes