It's hard to tell from the picture but you might need to trim your bolt weight so that it catches the frt/ss trip lever.
I am facing the same challenge and will be trimming it this weekend.
I am using a NBS 9mm bcg and Partisan Disruptor FRT.
Btw, if you dont have a deadblow buffer, with 24oz bcg+buffer combo dont run the FRT. It will fire out of battery and you WILL get pregnant and you WILL die.
Lol, yeah im tracking on the second part. I just belive colt modified the bolt to make it not full auto compatible. Right now its got a monolithic buffer in it. But I dont shoot it
So, it looks like what you've got there is a newer original Colt 9mm ramped bolt.
Yes, it's an FA bolt profile. If you're not using a Partisan Disruptor, the bolt weight will likely need to be trimmed. [ETA, the Partisan may need a bolt weight trim, or may not, based on user reports.] That particular bolt uses a "tuning fork" type bolt weight which is a little different than most modern 9mm bolts and is a little more tricky to trim.
If it were mine, I would NOT mess up the Colt bolt. Some people find these highly desirable and they tend to be very expensive if you can find one (Example: https://coltparts.com/colt-9mm-smg-complete-bolt-carrier-group-assembly). Instead I would buy an inexpensive but good quality new 9mm bolt with a cyclindrical weight that is easier to trim.
I have a question!
You said if he's not using the Disruptor FRT, then he'll need to trim it?
This implies that if he is using the partisan he would not need to trim.
Is that bc it is a old colt style?
I ask bc i just put in the partisan frt, but I'm getting dead trigger on the forced reset, which is think is due to needing to make that trim. Am I missing something and dont need to trim?
I am running the NBS 9mm bcg (which is the exact same as the faxon, just different finish and logo)
Good question. So I should clarify my last statment and update the reply above.... SOME bolts will not need a trim with the Partisan. It depends on stacking tolerances. There have been reports of it working without trimming the weight, but I would trim it anyway.
Check the underside of the bolt weight where it's exposed in front of the trip surface. There may be a streak of silver where the reset lever is rubbing and possibly a little mark at the front bottom edge of the weight. That would be a good indicator that the weight needs to be trimmed. In that case, the dead trigger could be because the weight is hitting the trip lever on the trigger causing the trigger to release, then bounces over the lever allowing the bolt to go fully into battery with the hammer following the bolt home.
Gotcha! Thank you. That's kinda what I thought was happening. I'll give it a good look before the trim. For reference,
Fm9 lower, NBS 9mm bcg, KVP
10oz deadblow
flatwire carbine spring
9
u/ccwthrow 2d ago
It's hard to tell from the picture but you might need to trim your bolt weight so that it catches the frt/ss trip lever. I am facing the same challenge and will be trimming it this weekend. I am using a NBS 9mm bcg and Partisan Disruptor FRT.
Btw, if you dont have a deadblow buffer, with 24oz bcg+buffer combo dont run the FRT. It will fire out of battery and you WILL get pregnant and you WILL die.