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Posted: 12/29/2013 6:29:19 PM EDT
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Had a bit of a machine gun shoot today and tossed my lower on several peoples uppers. When I got it back I tossed my upper on it and it would fire several rounds and light primer strike....
Swapped mags... same thing.. Different ammo... same thing... Noticed that the bolt was hard to pull back at times, had to stomp it open once... Dumped motor oil on the bolt... ran better...but basically did the same thing after several more rounds... Popped the rear pin and a battered 9mm shell casing fell out! Sucker was hiding behind the bolt apparently.... 
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| I had been running a 22LR upper and it was damn near 100%, put on my 5.56 upper and it would do a few rounds and light primer strike, sometimes it wouldn't fire the first round, so opened it up looked in the lower and the trigger spring was missing one of the tails LOL aka very weak trigger impact. |
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