entropy
Member
(Unfortunate) update:
I've shot some of this ammo through a couple other rifles unsuppressed with no issues.
Took the rifle in question out again today and tried out H1 and H2 buffer. With the H2 buffer unsuppressed, the ejection pattern changed to about 4 oclock (good, right?) Put the can on. First 15 or so rounds were looking good (remember 50% of primers were coming out with the regular carbine buffer).
Then with about 15 total rounds of the ammo left, a primer came out. Went to unload to make sure it was out of the action. Bolt was in battery with a live round in it, but wouldn't move.
Chose to fire the round in the chamber. Bolt made it back to the unlocked position, carrier about a half inch from fully closed. Pogoing, etc didn't result in any movement. Went home, mallet to the charging handle, nothing. Put a rod down into the bottom of the case and hammered it back just far enough to get the empty case out. That puts the carrier just far back enough to where I can't separate the upper and lower.
I have no leverage to get the carrier back forward. I'm 99% sure the primer is wedged between the carrier and the inside receiver wall. Probably galling a nice groove in the upper.
Extension is staked on, so would prefer not to take it off, but I can't think of any other way to get it apart right off hand.... any ideas? Its locked up tighter than a drum.
Exactly the situation the forward assist is for. Try a rubber or dead blow mallet on it.