Swapping out the spring didn't help at all, so I'm thinking maybe if I moved up to a full length rifle spring from Geissele that might help. Using 55 grain 5.56 from federal munitions and 30 round Magpul Pmags The buffer tube is about 7 inches long with an H buffer (3.0 oz exactly) and the spring is a crap spring i swapped out for a carbine spring from another rifle that works and cycles really well. Anyone have any ideas as to why this is happening?ġ8 inch aero precision barrel with rifle length gas system and aero precision adjustable gas blockĪnd a cheap buffer tube I bought on Amazon not knowing any better at the time. I let it cool down for a few minutes and it works fine again. The first maybe magazine and a half cycle fine and then after that it fails to extract almost every shot. I've put maybe 200-300 rounds through it and it works fine until it starts heating up. I recently built my first AR so I'm somewhat new at this but I'm having what seems to be a very unique issue.
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