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Posted: 3/11/2017 11:50:54 PM EDT
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Aero Upper and Lower
Aero BCG Aero LPK 20" Ballistic Advantage barrel Luth-AR MBA 1 Stock and Spring,tube, and buffer assembly Went to shoot my AR10/308 this afternoon. No optics yet, but just wanted to make sure it would cycle. I was running FreedomMunitions new 168gr hollowpoint ammo. When I pull the charging handle back to put a round in the chamber, that round fires perfectly every time. The issue is with the second round. The BCG feeds a second round, and the BCG appears to close all the way. However, the round won't fire. Not only does it not fire, but the trigger doesn't seem to be resetting and the safety can't be turned off. It acts like the rifle does after you fire a round, and there isn't even a click of the trigger after the first round is fired. Being that it's an AR in 308, I'm not as surprised to be having some issues. Has anyone dealt with this before? I have a feeling it may be since my BCG and barrel aren't from the same manufacturer. I feel like my buddy had a similar issue, but I haven't got ahold of him today. |
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Go through the same AR gas trouble shooting steps:
Obvious ones include: Cleaning.. Different mags.. Different non- freedom-munitions ammo.. Try loading and chambering only one round in a mag, and see if your bolt locks back after that shot. Your ammo choice doesn't really help with trouble shooting. Try some factory stuff through it. |
| Check for a bur on the selector and/or disconnector, also make sure the disconnector spring is not in a bind. Next check the trigger and hammer spring to make sure they are installed correctly. Sounds like your rifle cycles fine so the problem is all in the fcg. An easy fix to get your 308 up and running is to just swap out your fcg with another one from a working rifle. |
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If every other aspect of the firing cycle is working properly, which it sounds like it is, you most certainly have something going on with the FCG.
As recommended above... remove, inspect, and reassemble the FCG and try again. If still a no-go, try a FCG out of another functioning rifle. If the rifle is firing, extracting, ejecting, feeding, chambering, etc.... and all that appears to be absent is cocking, then the FCG is prime suspect. I'd look at and inspect the disconnector and spring first. |
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Quoted:
Gas block may be to far back and not enough gas cycling the bolt. Put a little gap between the gas block and the barrel shoulder. Try cycling the bolt manually while depressing the trigger to check the FCG. If everything feels normal you have a gas issue. If the next round is feeding, the hammer is rotating far enough to meet the disconnector. |
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Quoted:
If the next round is feeding, the hammer is rotating far enough to meet the disconnector. Maybe I have had adjustable gas blocks do the very same thing and then just turn the screw back a little and your back to operating. AR10 is a bit different animal than the AR15 and we don't know for sure the FCG in this weapon. Either way the disconnector is a bit short for that build, and the bolt is not creating enough force for the disconnector to grab or the disconnector is to stiff to allow the hammer past. |
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