Major03
Ultimate Member
Disassemble your upper from your lower and take a picture of the feed ramps
Disassemble your upper from your lower and take a picture of the feed ramps
Id take it to Chad he is in Glen Burnie Great guy and knows his stuff. despite what you may have read hear he doesn't have a I'm God complex .
Did you or anyone else d*ck with/replace the hammer spring?
Meaning is it a stock GI weight spring or a reduced weight spring?
Cuzz reduced weight and hard primers equals no Boom-Boom.
Outside of that, lube the ole girl up and give her another whirl.
PS: On-line reports say an AR needs at least a 3,000 round break-in period before they'll function correctly. Could be an urban legend though...
Hey guys this is one of the rounds that was failure to feed, racked the gun back, gun fired, ejected the brass and then failure to feed. The round is clearly not going into the chamber at the right angle to damage the case like this right?
The one thing that gives me a bit of hope that this is an easy fix from gunked up lube is your relating how the gun is failing to fire when a round chambers, and not just misfeeding under the bolt. Though I would find it rare for a modern lube to act up that badly from a couple of years storage, I have to admit I have not used Froglube much so I am not terribly familiar with it. In any case something is slowing that BCG down. I'm hoping it's just congealed lube and not an out of spec upper or receiver extension dragging on the BCG, or a problem with the barrel extension/feed ramps resisting the advancing round. Or it could even be an out of spec BCG. You may want to take a look inside the receiver extension and see if there is a lot of scratching going on. Especially scratching on just on side that gets worse as you get closer to the upper receiver itself. That's a classic sign of an out of spec upper or extension forcing the BCG to drag at an angle.
Obvious case of excessive bolt carrier drag. Those two somewhat opposing marks are the bolt lugs smashing the top of the brass and shoving it forward. Thats why the round isn't chambering and when it chambers it doesn't fire. Bolt isn't going fast enough or far enough.
Don't worry about your feedramps. PMAGs sit higher in the gun above the feed ramp. That's one of the reasons they're so reliable, the round goes in much straighter vs older USGI designs.
From the pictures here on page 4 can you see any abnormal scratches?
March 31st now...
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