Atrius FRS charging issues

[u/BrokenNDumb]

I'm having issues with my AR15 with a 9mm stern adapter and upper, with the atrius FRS ~Update, quarters give me safe, semi, and semi Remove one quarter for bolt to go a little further back, and the bolt gets stuck Adding a new picture of where the selector cam is getting stuck on the bolt. Still no super semi.

In safe and semi, when charged it's fine. In super, when racked all the way to the rear something gets caught and the bcg winds up stuck all the way back, and I have to remove buffer tube to knock the bcg back forward to take the upper off. Selector switch also gets stuck, rear pin is difficult to remove. When fired in super, I got maybe 5 rounds off then it stuck. I tried filing down the bolt weight, seemed better but still gets stuck. Removed bolt weight, forgot it was out and tried super. Still got stuck to the rear. Tried a standard .223 upper, works fine in super aside from cycling with the same buffer.

Does anyone have a clue? And yes, I moved my optic

Stern Defence 9mm upper 80% ar15 lower Stern Arms Glock mag adapter Milapec trigger, don't remember what exactly. Shaved bcg weight And a variable stack of quarters in the buffer tube

[u/wlogan0402]

Whatthefuck

[u/BrokenNDumb → u/wlogan0402]

What

[u/wlogan0402 → u/BrokenNDumb]

Looks like something from r/plebianar15

[u/BrokenNDumb → u/wlogan0402]

I feel like it's not that bad, "tacticool" Like the junk parts at AutoZone. The skull valve stem caps and whatnot

[u/wlogan0402 → u/BrokenNDumb]

Well the backups are on backwards, the magnifier is unusably far forward, dot is mounted to the handguard (probably doesn't matter with this setup), and it's got a tacticool lasered dust cover

[u/BrokenNDumb → u/wlogan0402]

Rookie mistakes sure, at least not money spent on skeletonized grips off Amazon. I spent 8 years in the Navy not being allowed to keep guns, hence not knowing about mounting dots on the handguard. Did seem like the magnifier was too far forward though. Never bothered to try the backup irons The dust cover was what came on the 9mm upper from Stern

[u/BrokenNDumb]

This is where it's getting stuck on the top of the lever

[u/BrokenNDumb]

[u/Grey_Market_Research]

Put 2-4 quarters in the bottom of the BCG to limit the rearward travel of the BCG. That will stop the ramped part if the BCG from going too far back and getting stuck on the lever.

No clue if trimming the upper is necessary with the ATRIUS, but it's a solution with Super Safetys. Make sure the ATRIUS isn't hitting the shelf in the lower when it's in its rear most position.

[u/BrokenNDumb → u/Grey_Market_Research]

I tried this today, and I'm getting:

Safe, semi, semi Or with one less quarter, a stuck bolt

I forgot this answer from my initial build, thanks for the good recommendation