first carbine unboxing

[USGI]

Are you suggesting stock inletting might be loose enough the pin could slip out partway?

Yes, that's what was causing mine to jam. After it did it 2 or 3 times I noticed the slide got sort of hard to pull back, like something was trying to lock up. The empties were being extracted, but the misalignment caused by the out of place trigger pin was blocking the bolt from coming back far enough to strip the next round from the magazine - and instead got stuck in the groove at its base. At least that's how I was seeing it.

I made a longer pin out of a broken 1/8" drill bit. Went out a few days later and ran a full box of ammo through it without a problem. A poorly made aftermarket stock was the actual cause. If Charlie wants to donate a nice UEF stock, I saved the original pin! - Bob