Am I looking at a gas block problem?
Hi Folks,
I'm trying to troubleshoot a no-name 16" mid length upper. Every so often the bolt does not hold back after last round. Also I'd say every 20-30 shots the firearm cycles ok (spent case ejects), click, no bang, and there is no cartridge in the chamber. I've played with buffers, tried different ammo, bolt, entire lowers and magazines.
Do the pictures mean anything? I am assuming (very novicely) that the gas block is somehow not in spec and is leaking gas and/or was not installed properly...
2nd picture is the same as the 1st, but I suspect there is gas leaking in the highlighted area? I am not technical savvy to decipher them. Also does the gas port look ok?
Thanks in advance...
http://i.imgur.com/WK1WiFu.jpg
http://i.imgur.com/14syvOY.jpg