10-29-2012, 10:55 PM
Iman Did you try placing 1 cartridge in the mag and seeing if it locks back? If it does then there is a problem with the extractor. Or does the bolt carrier not move at all after fireing? Last week I was out shooting a new upper and found the bolt carrier not operational. Ran compressed air through the gas tube when I got home it was OK. Ran some CA into the gas key and it did not push the bolt out. Took the gas key off found that it was not drilled through. If you dont have gas getting through it won't matter what kind of a buffer you have.