jeremyvyoral Posted February 19, 2017 Author Report Share Posted February 19, 2017 2 hours ago, mrmackc said: Magazine is? Pmag. Quote Link to comment Share on other sites More sharing options...
washguy Posted February 19, 2017 Report Share Posted February 19, 2017 (edited) Jeremy lube it up one bullet in mag charge it fire it...the bcg has to lock back on bolt catch....your gas tube looks to be too short This is how it should look , Wash Edited February 19, 2017 by washguy Quote Link to comment Share on other sites More sharing options...
jeremyvyoral Posted February 19, 2017 Author Report Share Posted February 19, 2017 3 hours ago, mrmackc said: That should be a good rifle. I couldn't find the Thundergun.com web site except for one that wasn't selling any LT308 kits. Mind posting a good link for us? Sorry, should be Thundertactical.com. Quote Link to comment Share on other sites More sharing options...
jeremyvyoral Posted February 19, 2017 Author Report Share Posted February 19, 2017 2 minutes ago, washguy said: Jeremy This is how it should look , Wash Then mine definitely seems short. Quote Link to comment Share on other sites More sharing options...
washguy Posted February 19, 2017 Report Share Posted February 19, 2017 Jeremy heres a gas tube that's too short ....doesn't take much to fubar a rifle Wash Quote Link to comment Share on other sites More sharing options...
jeremyvyoral Posted February 19, 2017 Author Report Share Posted February 19, 2017 18 hours ago, mrmackc said: Welcome from Central Texas. Let's start with the easy stuff first after you post all the info you have on the model, description ETC. of your new build. Like is it a 16 "barrel, Gen one or Gen two DPMS LR308? is it a DPMS Magazine. 1st as was stated you need to lube up the upper, the bolt and carrier it needs to be dripping WET. Many here use Mobil 1 synthetic 10W40 , YES like you put in your new truck engine. AND...When you go to the range next time load only one round in the magazine, when you fire the rifle does the bolt lock back on the EMPTY magazine? Should I dunk the whole bcg in oil? Or just the carrier? Quote Link to comment Share on other sites More sharing options...
mrmackc Posted February 20, 2017 Report Share Posted February 20, 2017 (edited) Maybe some dunk the BCG in oil. I brush the oil on with a 1/2 inch wide brush and be sure it covers the surface of the bolt except the face like to get it on the cam and pin, the locking lugs and not in the chamber. On the sliding surfaces and gas rings and one drop in the gas key. I also lube the buffer and spring ant a thin coat in the buffer tube. Bolt release mag latch.I also run a wet hoppes patch through the bore from the chamber to to the muzzle every 5 or 10 shots I don't really know if that is how these shooters do it, most of them have boo-koos more experience with the AR308 than I do. I only have owned my factory built DPMS LR308 since November 2014 and barely have it broken in. I also shoot a M1A. and a .3006 M1. Edited February 20, 2017 by mrmackc Quote Link to comment Share on other sites More sharing options...
jeremyvyoral Posted February 20, 2017 Author Report Share Posted February 20, 2017 Thanks. I had no idea it needed to be that wet. Quote Link to comment Share on other sites More sharing options...
jeremyvyoral Posted February 20, 2017 Author Report Share Posted February 20, 2017 I loaded one round in the magazine, it does lock back after the round is fired. So, after I lubed it up, I tried two rounds. It still fails to feed the second round, it hangs up on the second. Quote Link to comment Share on other sites More sharing options...
washguy Posted February 20, 2017 Report Share Posted February 20, 2017 1 hour ago, jeremyvyoral said: I loaded one round in the magazine, it does lock back after the round is fired. So, after I lubed it up, I tried two rounds. It still fails to feed the second round, it hangs up on the second. Jeremy Ok..good deal on the bcg locking back ! Feeding probs are mostly mag problems a lot of members state....and pmags are sometimes the culprit We do need a pic of whats happening with the second round...so is the first round ejected? is the second round stove piped?...things like that..a pic would really help...If it were me I would get another mag ...a metal one... also lets see a pic of the buffer and its measured length and the buffer spring its measured length ...and you prolly have the new gun blues too....needs to loosen up....but give us a pic Wash Quote Link to comment Share on other sites More sharing options...
Rsquared Posted February 21, 2017 Report Share Posted February 21, 2017 Welcome aboard Jeremy. Sounds like the fella's already have you looking in the right direction. Quote Link to comment Share on other sites More sharing options...
jeremyvyoral Posted February 21, 2017 Author Report Share Posted February 21, 2017 15 hours ago, washguy said: Jeremy Ok..good deal on the bcg locking back ! Feeding probs are mostly mag problems a lot of members state....and pmags are sometimes the culprit We do need a pic of whats happening with the second round...so is the first round ejected? is the second round stove piped?...things like that..a pic would really help...If it were me I would get another mag ...a metal one... also lets see a pic of the buffer and its measured length and the buffer spring its measured length ...and you prolly have the new gun blues too....needs to loosen up....but give us a pic Wash The spent she'll is ejected, sometimes the bolt goes back into battery, sometimes it hangs on the second round. If the BCG goes into battery, I noticed that it creases the next round in the magazine. Quote Link to comment Share on other sites More sharing options...
washguy Posted February 21, 2017 Report Share Posted February 21, 2017 Heres the proper spring and buffer for car308 stock......an ar15 spring/ buffer will fubar ur rifle Wash Quote Link to comment Share on other sites More sharing options...
washguy Posted February 21, 2017 Report Share Posted February 21, 2017 (edited) So if your spring/buffer are not correct...the rifle will lock back sometimes but the bcg is not far enough in the back position causing feeding probs...heres a pic...look at how the bolt catch is in position ....the wrong buffer or spring will sometimes hold back on the catch.,but not back far enough giving you a feeding problem Wash this is as far as I can go without the pic of your particular situation Edited February 21, 2017 by washguy Quote Link to comment Share on other sites More sharing options...
jeremyvyoral Posted February 21, 2017 Author Report Share Posted February 21, 2017 18 minutes ago, washguy said: So if your spring/buffer are not correct...the rifle will lock back sometimes but the bcg is not far enough in the back position causing feeding probs...heres a pic...look at how the bolt catch is in position ....the wrong buffer or spring will sometimes hold back on the catch.,but not back far enough giving you a feeding problem Wash this is as far as I can go without the pic of your particular situation I'll send some pics as soon as I'm able. Thanks again for the help. Quote Link to comment Share on other sites More sharing options...
survivalshop Posted February 23, 2017 Report Share Posted February 23, 2017 (edited) Since you mention a Castle nut you must have a Carbine Stock , so a reading on the Springs Coil count & length & as photos show in Wash's post above , also need a Buffer Length & weight . There is an issue with the Gas Tube protrusion into the Upper receiver , you may ( maybe ) get away with that protrusion with a Carbine Gas length system , but the Rifle length system will probably have issues because of the softer Gas impulse . The resistance of the next round in the Mag against the BCG will more then likely cause failure to fully feed or lock the Bolt , even though it locks the BCG back on last round fired in the mag.. Of course this all depends on if all the correct components in the Buffer assembly. Need to remove the Gas Tube & measure it or find out from the Manufacturer of the Upper ,what length Tube they use , an AR 10 rifle length Gas Tube is longer then the AR 15/DPMS LR used in some DPMS Builds / Barrels . Edited February 23, 2017 by survivalshop Quote Link to comment Share on other sites More sharing options...
98Z5V Posted February 24, 2017 Report Share Posted February 24, 2017 On 2/20/2017 at 3:24 PM, washguy said: Feeding probs are mostly mag problems a lot of members state.... DOUBLE FEEDS are ALWAYS MAG RELATED. We don't even know what he's describing as a "feeding problem" yet... "creases the next round in the magazine" sounds like the bolt is hitting the top of the next round, but not catching it. Could be a weakass mag spring, could be not enough gas in the system... even if it locked back on one round. Dunno... The very first step that needs to happens is... Ding, ding, ding!!! Replace that gas tube with an Armalite AR-10 rifle-length gas tube. FIRST. I do believe he said it was a rifle-length gas system. Before any other "guesstimation" takes place, that gas tube needs to be replaced. Period. Quote Link to comment Share on other sites More sharing options...
survivalshop Posted February 24, 2017 Report Share Posted February 24, 2017 On 2/19/2017 at 1:08 PM, jeremyvyoral said: The Upper Receiver parts included are below: 15' Keymod Rail Upper Receiver , DPMS style . Forged from 7075 T6 aluminum. This Upper is bead blasted and anodized Black. 20" .308 Barrel Rifle Gas System Phosphate Coated 1/10 Twist Chromoly The Lower Receiver parts included are below 80% Lower Receiver , DPMS style . Forged from 7075 T6 aluminum. Magwell is broached for a perfect fit and are machined to spec so that all accessories will fit. This Lower is bead blasted and anodized Black. The operations left to be completed on the 80% Lowers .308 Lower Receivers are as follows: Complete AR Butt Stock Assembly w/ Buffer, Tube, spring, butt plate and castle nut He gave this out in the first page , I had to look for it also. Quote Link to comment Share on other sites More sharing options...
jeremyvyoral Posted March 4, 2017 Author Report Share Posted March 4, 2017 On Tuesday, February 21, 2017 at 1:05 PM, washguy said: Heres the proper spring and buffer for car308 stock......an ar15 spring/ buffer will fubar ur rifle Wash Finally had time to pull out and measure buffer and spring. Everything looks good Quote Link to comment Share on other sites More sharing options...
Armed Eye Doc Posted March 4, 2017 Report Share Posted March 4, 2017 31 minutes ago, jeremyvyoral said: Finally had time to pull out and measure buffer and spring. Everything looks good Your buffer appears to be 1/8 inch short and the spring looks 3/8-1/2 inch short. I am far from an expert, but small differences matter. Quote Link to comment Share on other sites More sharing options...
washguy Posted March 4, 2017 Report Share Posted March 4, 2017 (edited) 1 hour ago, Armed Eye Doc said: Your buffer appears to be 1/8 inch short and the spring looks 3/8-1/2 inch short. I am far from an expert, but small differences matter. Exactly that looks to be an ar15 spring... not even close to 111/4 inch car 308spring buffer is too short..maybe camera angle on the buffer...nah its short Wash "Finally had time to pull out and measure buffer and spring. Everything looks good" ...what makes you think everything looks good? LOL we are gonna send you to the remedial ruler 101 measuring class and count the coils too Wash Edited March 4, 2017 by washguy Quote Link to comment Share on other sites More sharing options...
washguy Posted March 4, 2017 Report Share Posted March 4, 2017 Quote Link to comment Share on other sites More sharing options...
98Z5V Posted March 4, 2017 Report Share Posted March 4, 2017 (edited) On 2/24/2017 at 6:14 AM, survivalshop said: He gave this out in the first page , I had to look for it also. Gotta get an Armalite AR-10 rifle gas tube in that thing before any other attempts at diagnosis... Gas has to be guaranteed, first. Edited March 4, 2017 by 98Z5V Quote Link to comment Share on other sites More sharing options...
jeremyvyoral Posted March 4, 2017 Author Report Share Posted March 4, 2017 4 hours ago, 98Z5V said: Gotta get an Armalite AR-10 rifle gas tube in that thing before any other attempts at diagnosis... Gas has to be guaranteed, first. Thanks got one on order. Quote Link to comment Share on other sites More sharing options...
washguy Posted March 4, 2017 Report Share Posted March 4, 2017 Jeremy you posted up that you had a Complete AR Butt Stock Assembly w/ Buffer, Tube, spring, butt plate and castle nut so if that's the case and its an ar15 car buffer tube which works for the ar308car buffer tube.....measure the inside length it should be 7 inches......you may have an Armalite which is a different length Wash Quote Link to comment Share on other sites More sharing options...
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