CMonty Posted January 31, 2015 Share Posted January 31, 2015 Ive been having issues with a 3 gun rifle that I assembled and wanted to get some opinions on some possible trouble shooting. Rifle Specs: Aero Precision Upper and Lower Nordic 18" wylde chamber barrel Seekins ATC Comp Odin Works gas block w/ melonited rifle length gas tube VDI Low Mass BCG Raptor CH Hyperfire 24C Trigger (heavy springs installed) Rifle length buffer tube/spring/buffer (weights removed to 3.3oz) Rifle will fire but will not extract nor eject spent cartridge. I am able to extract using the charging handle however the force required to do it is significantly greater than my other AR15s. I had thought it was a gas problem and replaced the previous Carbon Arms gas block with the odin works, no change. After inspecting the brass there is evidence of ejector swipe. I am starting to think of the possibility of the chamber being too tight. Any opinions would be greatly appreciated. Charles Link to comment Share on other sites More sharing options...
striped1 Posted January 31, 2015 Share Posted January 31, 2015 I know the Nordic 18" have an undersized gas port to run with a low mass carrier system. Have you tried other ammo? I would get another batch of ammo - factory match, maybe a box of federal and a box of Black Hills and try to rule out the ammo first because your set up looks good on paper. Link to comment Share on other sites More sharing options...
Woodsk Posted January 31, 2015 Share Posted January 31, 2015 If these are hand loads my guess would be that your sizing die is not fully seated Link to comment Share on other sites More sharing options...
CMonty Posted January 31, 2015 Author Share Posted January 31, 2015 Those were Freedom Munitions 55GR Reman Link to comment Share on other sites More sharing options...
wgj3 Posted January 31, 2015 Share Posted January 31, 2015 Have you had the same problem with other ammo? Also, you mention changing the gas block, but nothing about confirming that it is properly aligned and allowing enough gas to get to the bcg to cycle the action. Link to comment Share on other sites More sharing options...
CMonty Posted January 31, 2015 Author Share Posted January 31, 2015 I have displaced the gas block and the gas pattern is concentric to the gas port. I have used M855, M193, PMC bronze and FM 55gr Bulk to no success. Link to comment Share on other sites More sharing options...
blairmckenzie1 Posted January 31, 2015 Share Posted January 31, 2015 do you have a different bolt to try? Link to comment Share on other sites More sharing options...
CMonty Posted January 31, 2015 Author Share Posted January 31, 2015 my ranger buddy brought that idea up, next range trip im going to bring out a different bcg and try that out. Link to comment Share on other sites More sharing options...
blairmckenzie1 Posted January 31, 2015 Share Posted January 31, 2015 swap a different bolt in a just try hand cycling a few rounds through it. You may have just ended up with a tight chamber and a big bolt. Link to comment Share on other sites More sharing options...
wgj3 Posted January 31, 2015 Share Posted January 31, 2015 Gas tube properly aligned? Not binding on gas key? Link to comment Share on other sites More sharing options...
blairmckenzie1 Posted February 1, 2015 Share Posted February 1, 2015 my ranger buddy brought that idea up, next range trip im going to bring out a different bcg and try that out. just the bolt, carrier doesn't really matter Link to comment Share on other sites More sharing options...
dauntedfuture Posted February 2, 2015 Share Posted February 2, 2015 at the range next time attempt to gently chamber a round of loaded ammo in a clean chamber and attempt to extract that loaded round of ammo. Both should be easy to do. If you cant chamber factory ammo of several MFGs this way, your chamber is too tight. We need some pics, of the extractor marks on the brass, is the extractor riding over the brass and leaving the brass in the chamber? If so, again I suspect that the chamber is too tight. Link to comment Share on other sites More sharing options...
bmiller Posted February 2, 2015 Share Posted February 2, 2015 I have the same barrel. It runs fine, but extraction is very difficult. Sent it back to Nordic, they ran a reamer in it and said it was within spec. Swapped out bolts. I went through a few I had here and used the one with the most amount of headspace. Still having issues with ammo that chambers and extracts perfectly in a Colt Competion Rifle that has a very tight chamber and bore. I hope we can figure this out, mortoring out rounds at ULASC is not fun. I have been tempted to run a 5.56 reamer in the barrel. Link to comment Share on other sites More sharing options...
Tedward Posted February 2, 2015 Share Posted February 2, 2015 Like already mensioned, try some other ammo and just use a bolt to insert and remove it by hand. If the case is tight in the chamer, try to apply some lapping compound on a cotton bore mop and polish the chamer so the bullet will be in a smooth and deburred surface. Something like this from Brownells. http://www.brownells.com/gun-cleaning-chemicals/patches-mops/bore-mops/ar-15-replacement-bore-mops-prod42146.aspx Put the mop in a drill and do that for a few seconds. While your at it, pollish your feed ramps and see if that helps. it might just be a tight camber and if removing the tooling marks and burs, it might help. Link to comment Share on other sites More sharing options...
dauntedfuture Posted February 2, 2015 Share Posted February 2, 2015 I would suggest that after checking everything and if you cant get it worked out, just send the barrel back. I would not polish the chamber as there are not marks on the cases. If I owned a company that's known for standing behind their products and you did something like polish the chamber, I'm not sure I would be able to do much for you. You also run the risk of creating an oblong chamber. Alternatively if your stuck and they will not take the barrel back, ream out the chamber with a known quality finish reamer a gunsmith should be able to do this for next to nothing after checking with gauges. Link to comment Share on other sites More sharing options...
CMonty Posted February 2, 2015 Author Share Posted February 2, 2015 Nordic replied to my email and asked me to send it in. I plan on making my final tests and checks this weekend, if nothing works then it is going back. Link to comment Share on other sites More sharing options...
OPENB Posted February 2, 2015 Share Posted February 2, 2015 What buffer system? When ran too heavy of buffer with my Voodoo bcg & adjustable gas I got fte & feed. Link to comment Share on other sites More sharing options...
CMonty Posted February 2, 2015 Author Share Posted February 2, 2015 Originally had an empty rifle buffer, approx 1.2 oz, then replaced some of the weights and now weighs 3.3oz. Rifle length extension and buffer Sent from my iPad using Tapatalk Link to comment Share on other sites More sharing options...
CMonty Posted February 7, 2015 Author Share Posted February 7, 2015 UPDATE Went to the range today with a fully functioning AR15 and begin to swap parts. I tried every combination of BCG, Bolt, Upper, Lower possible and discovered that the Nordic Barrel was NOT at fault. I back this up by going to Rose Action Sports and re tested everything. Together Steve Rose and I discovered that some how, some way the VDI Low Mass Bolt Carrier is out of spec. Rifle functioned perfectly with a full mass spikes BCG, even with the VDI bolt in the Spikes BCG. No combination that included the VDI Low mass carrier worked. We removed the gas key and there were no obstructions and it was properly staked down. The exact reason will be a mystery but atleast I discovered the problem. Link to comment Share on other sites More sharing options...
CMonty Posted February 26, 2015 Author Share Posted February 26, 2015 VDI replaced the bolt carrier with their new. Integrated Gas Key carrier and worked perfect. Sent from my iPad using Tapatalk Link to comment Share on other sites More sharing options...
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