ReddingShooter Posted July 11, 2017 Report Share Posted July 11, 2017 I just completed an AR10 308 build and shot it for the first time today. It did not go well and I'm at a loss and looking for some help. Here's what happened. The first shot went off and ejected the empty. On the second pull of the trigger it didn't pull (as if the trigger was stuck) When I tried to pull the charge handle back to eject the new round it pulled back about 3/8's of an inch and stopped. I opened the rear release pin and tried again. With a much harder pull on the charge handle it did come out, it was like it was jammed or stuck in the one spot and then came out easily once past that point. Before I pulled it out, I was able to push the handle and BCG back in but when I tried to pull it back out it still stuck. AND here's what really troubles me. The live round had a lite firing pin mark in the primer although I was never able to pull the trigger for a second shot. Somehow the firing pin struck the primer when it fired and reloaded. I tried a second time with a different brand of ammo but the same thing occurred. Any and all suggestions please!!! Quote Link to comment Share on other sites More sharing options...
blue109 Posted July 11, 2017 Report Share Posted July 11, 2017 (edited) The pin will always tap the primer and leave a small dimple when the bolt slams closed. Free floating firing pin. No need to sweat that part. Details on your rifle build to help further. Edited July 12, 2017 by blue109 Quote Link to comment Share on other sites More sharing options...
sketch Posted July 12, 2017 Report Share Posted July 12, 2017 keep the barrel down range untill you get it figured out? barrel and bolt headspaced by manufacturer or smitter? Quote Link to comment Share on other sites More sharing options...
ReddingShooter Posted July 12, 2017 Author Report Share Posted July 12, 2017 My upper is an Aero Precision AR10 308. The BCG is a Toolcraft Nickel Boron 308 DPMS Bolt Carrier Group. It's supposed to be milspec. I bought the BCG from a dealer on Gun Broker. The barrel I bought in an auction on Gun Broker. It isn't marked with a manufacturer and it was fairly inexpensive but it was described as DPMS compliant. Since I posted the question I did take it all apart to check everything. I noticed when I did the BCG pulled out of the barrel pretty hard at first, sort of like it was doing after I fired it. I disassembled it, cleaned it and checked it over. I all looked good, Re-lubed it too. I cleaned up the barrel where the bolt slids in too although it really wasn't dirty but brushed it real well to make sure there wasn't something in there that may have been caused it to bind. I also make sure nothing was binding on the gas tube too. Right now it's back together and is sliding in and out easily. It all seems good. I am going to try again in the morning. If anyone up still up and wanting to suggest something to try I'm all ears. Anything will help. Oh, one other thing. Not sure on the head space question other than to say I bought all parts separately so there was no manufacturer matching the BCG up with the barrel. Thanks Quote Link to comment Share on other sites More sharing options...
washguy Posted July 12, 2017 Report Share Posted July 12, 2017 Redding just put a rifle together with a toolcraft nb bcg...and this thing is nice and well made...don't think the bcg itself is your problem......I always open the rifle muzzle down then drop in the bcg....should just about go into battery ....slide your charge handle and see if it somehow grabs in a certain spot.....other than that....you must function check to see if bolt catch holds....one round in mag...charge it shoot it...bcg should then be held by the bolt catch and be open...if not you must start the search on why it isn't catching Wash Quote Link to comment Share on other sites More sharing options...
98Z5V Posted July 12, 2017 Report Share Posted July 12, 2017 52 minutes ago, ReddingShooter said: The barrel I bought in an auction on Gun Broker. It isn't marked with a manufacturer and it was fairly inexpensive but it was described as DPMS compliant. I'd suspect this, first - with a tight chamber. Got a GB link to the same barrel for sale? Maybe we can check that out. It's not a problem with the upper receiver - AP makes a good, reputable product. Still needs to be inspected, though. It's not the BCG - Toolcraft makes a great BCG,and they are the provider for ALOT of boutique-brand 5.56 BCGs. They've been at this game for a long time, and do the 5.56 mil-spec BCG right. However, you mentioned that this is a mil-spec BCG in your 308. Just so you know, there is no mil-spec for 308ARs. Just isn't one. Doesn't exist. Toolcraft probably makes their 308 BCGs to the same specifications as the 5.56 BCGs, though. Now, all that said, BCG still needs to be inspected, even though BCGs aren't commonly responsible for this type of malfunction... That barrel, man... I keep going back to that unknown GB barrel... and it's probably got a tight chamber... Quote Link to comment Share on other sites More sharing options...
survivalshop Posted July 12, 2017 Report Share Posted July 12, 2017 I have noticed that some ( actually quite a few ) NIB coated Bolts are sometimes tight , even testing Head Spacing , some are tight , but with a break in round count settle right in & HS easily . If the Chamber /Bolt pass HS testing , test fire & let us know the out come . Quote Link to comment Share on other sites More sharing options...
DNP Posted July 12, 2017 Report Share Posted July 12, 2017 Out of curiosity, what ammo were you using? Quote Link to comment Share on other sites More sharing options...
ReddingShooter Posted July 13, 2017 Author Report Share Posted July 13, 2017 Ok, got the problem resolved. I hate to admit it but it turned out to be something very simply and stupid on my part. I either didn't put in the disconnect spring or it fell out during installation. After my first shot the hammer was never captured thus it was down and that is why I couldn't pull the trigger on the second round. As far as the bolt sticking, it has loosened up since I re-adjusted the gas tube. I took it out after putting in the spring and it worked perfectly. Feeling a bit stupid but happy it wasn't anything more serious (like a barrel problem) I just thought I'd share since you guys had tried to help out. Thanks again and happy shooting Quote Link to comment Share on other sites More sharing options...
sketch Posted July 13, 2017 Report Share Posted July 13, 2017 carry on bro some things get missed.. ?? Quote Link to comment Share on other sites More sharing options...
washguy Posted July 13, 2017 Report Share Posted July 13, 2017 Good going! Wash Quote Link to comment Share on other sites More sharing options...
98Z5V Posted July 13, 2017 Report Share Posted July 13, 2017 On 7/11/2017 at 1:16 PM, ReddingShooter said: The first shot went off and ejected the empty. On the second pull of the trigger it didn't pull (as if the trigger was stuck) When I tried to pull the charge handle back to eject the new round it pulled back about 3/8's of an inch and stopped. I opened the rear release pin and tried again. With a much harder pull on the charge handle it did come out, it was like it was jammed or stuck in the one spot and then came out easily once past that point. This right here is not a disconnector issue - what did you have to do to the gas tube, as you stated below? 2 hours ago, ReddingShooter said: Ok, got the problem resolved. I hate to admit it but it turned out to be something very simply and stupid on my part. I either didn't put in the disconnect spring or it fell out during installation. After my first shot the hammer was never captured thus it was down and that is why I couldn't pull the trigger on the second round. As far as the bolt sticking, it has loosened up since I re-adjusted the gas tube. Just trying to figure out this whole thing in my head... Quote Link to comment Share on other sites More sharing options...
survivalshop Posted July 13, 2017 Report Share Posted July 13, 2017 7 hours ago, 98Z5V said: This right here is not a disconnector issue - what did you have to do to the gas tube, as you stated below? Just trying to figure out this whole thing in my head... It was probably rubbing on the Carrier Key . good job going back over assembly . Quote Link to comment Share on other sites More sharing options...
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