Hey all I recently got my first ar and got out today to put the first rounds through it. It seemed to work just fine for about the first 15 shots then started failing to feed every single shot, the bolt was also not staying open when mag emptied.
Seems to me the bolt stopped traveling far enough back to catch a new cartridge or hit the bolt stop, it was however ejecting the fired round. From what ive read most people would seem to suggest a gas block/tube or buffer issue but that fact it was working with the first few shots makes me think otherwise. I also read some people suggesting it should be excessively oiled for a new build to break in. Being my first ar I played around with it a bit and took it apart a few times without re oiling and it was fairly dry when it was failing, curious if anyone thinks a lack of oil could cause such issues?
I should also mention I was shooting federal 149 gr fmj 7.62 nato not 308 win, however everything ive seen says that is fine. Ill do my best to list parts and apologize for any lack of info as I dont know a lot about the ar platform. Appreciate any help offered.
stag 10 upper and lower w/ lower parts kit
aero precision m5 308 carbine buffer(spring is 11" long, buffer is 2.5" and weighs 3.8 oz)
magpul acs adaptable carbine milspec stock
faxxon firearms BCG, QPQ nitride
Ballistic advantage 20"heavy barrel 4150 cmv, rifle length gas
strike industries enhanced low profile gas block, 0.750"
Lantac nitride gas tube, rifle length
running magpul pmags
