


Trip Bar Help Needed
GEN2 MPX 8in with ArcFire 45-90 V2
I’m having an issue where I cannot get the gun to rack past 3/4ths of the way.
The FRT function tests fine inside of the lower, but it isn’t working properly with the upper because it’s not charging correctly.
The Bolt catch isn’t working as well as a result of how far back the bolt goes as well.
It slides but it’s stiff, I worked it a little until it was easier to move.
I tapped the pins in with a medium amount of pressure. It took a little force to set them, but once it was in, it went in pretty smoothly. I tapped it a little more until it was closer to being flush.
I cleaned the gun after picking it up, it has maybe 50 rounds through it since
Semi Automatic works, but FRT mode is running poorly. I can feel the trigger wanting to reset but since it’s not traveling far enough to reset it every time then it’s only functioning like semi.
I had a few 2 rd bursts in frt mode and one 5 rd burst but it was jamming fairly often between them
Any ideas on how to get this out and tune it properly? Thanks in advance.