CMC Trigger issue

[Chapo]

At a Match last week, when shooting I would experience the trigger lock as if it was on safe. This happened several times. Seems like the disconnector is not catching the hammer and I’m assuming this is the issue. But I have no idea the inner workings of the trigger group. Please advise. 

 

Edited September 24 by Chapo

[rishii]

Contact cmc and send it back for repair

my CMC trigger group broke a spring, I sent it to them and had it returned pretty quickly 

[mrvip27]

CMC will fix it...downside to cassette triggers...cant work on it without voiding warranty, etc.

 

Either way, I have had two fail...switched out to Hiperfire and been gtg.

Edited September 25 by mrvip27

[Chapo]

Thanks I’ll look into that. But what I need clarification is on, whether the trigger is supposed to be retained by the disconnector. 

[mrvip27]

On 9/25/2024 at 1:32 PM, Chapo said:

Thanks I’ll look into that. But what I need clarification is on, whether the trigger is supposed to be retained by the disconnector. 

 

No. It is not supposed to hold it indefinitely, only briefly until the sear/hammer/trigger engage.

 

Your video is dark so its hard to see what is going on.

 

Edited September 27 by mrvip27

[Chapo]

Great video. Thanks 

[Ryan N]

I have close to 6000 rounds through my PCC with the CMC trigger without issue.  Prior to that, I used a Hyperfire and had an issue with the hammer delaying to release.  I believe this happened due to blow back build up on the spring struts.  To clarify, I pulled the trigger, nothing happened and then the gun went off a second or two later.  In full disclosure I had fired several hundred rounds suppressed in addition to 700-800 rounds of unsuppressed rounds.  Maybe it was a freak occurrence but it did happen.  This was a 24 3G trigger which I have moved over to a standard AR.  I like the Hyperfire but don't trust it in a PCC due to this experience.  

[Ltdgun40]

Hiperfire Triggers are your friend.

 

[bigdawgbeav]

On 9/29/2024 at 12:26 PM, Ltdgun40 said:

Hiperfire Triggers are your friend.

 

I have personally seen several Hiperfire triggers go into burst mode... just as an FYI when looking at trigger options.

[Chapo]

Thanks all. Will take the rifle to the range and report back. Got a feeling there was a loose primer stuck in the mechanism that caused the trigger to act locked as if it was on safe. 

[outerlimits]

had a primer back out into the cmc trigger group on my AR at a 3 gun match years ago.  couldn't figure it out till I got home to clean it.  look under the trigger bar at the front left-there is a primer.  stopped the whole thing and killed a stage.

[Ryan N]

35 minutes ago, outerlimits said:

had a primer back out into the cmc trigger group on my AR at a 3 gun match years ago.  couldn't figure it out till I got home to clean it.  look under the trigger bar at the front left-there is a primer.  stopped the whole thing and killed a stage.

Wow, that's something to look out for.  I suppose that can happen with any FCG.  When I'm seating primers, if it feels too loose I've learned I can typically press the primer back out by hand with a push pen.  

[Chapo]

Outerlimits, exactly my issue!

[Ryan N]

Note to self.... pull FCG next time I clean..... I have not done that.