So my buddy has an Olympic arms ar-15 and every time we go shooting the entire bolt assembly seems to get stuck or sluggish after firing a round. So I broke the gun down, lubed it up and still the same issues. Any ideas? Could it be the buffer not pushing back strong enough to chamber the next round?

Ok. Thanks. I'll take a look at that.

So I figured out what was wrong with my buddies AR. It seemed to be getting stuck while being racked all the way back. So I broke her down and inspected closer and saw that the BCG was rubbing the walls quite badly. So long story short... After 3 hrs of sanding and polishing the BCG and inside the upper she was as good as new. Or should I say as good as broken in. I think that was the biggest issue, it not being fully broken in.

I know this is an old post, so the problem sounds like it's rectified, but I'd add that common mistake folks make is putting the firing pin retaining pin in from the right to the left, instead of from left to right (like should be done). When this is done incorrectly, the head of the firing pin retaining pin will protrude slightly from the right side of the carrier and drag the inside of the upper receiver, causing sluggish operation or in come cases, the bolt carrier sticking in the upper.

PS: I was a DOD Small Arms Repairman and military firearms instructor, so I've seen this happen MANY times!

Yeah, the recess for the pin head needs a neon-light above it. I've seen lots of troops screw that one up...

I see you were a 45B. I was a Combat Arms Specialist, aka CATM (Air Force small arms repairman). I'd bet we could share some stories! I retired last spring. 20 years goes quick...