Beangun Posted November 14, 2021 Report Share Posted November 14, 2021 Hey guys Im having trouble with my newly purchased group industries bar bolt getting stuck forward sometimes. You have to hit the butt stock on something pretty hard while pulling the bolt back to get it to release. I make sure to use plenty of oil every time I clean but that doesnt seem to help. Any ideas would be great. Thanks Link to comment Share on other sites More sharing options...
Orion Posted November 14, 2021 Report Share Posted November 14, 2021 Check for carbon buildup in your gas regulator and gas cylinder tube/ gas piston. Link to comment Share on other sites More sharing options...
BPinFL Posted November 15, 2021 Report Share Posted November 15, 2021 I Second Orions response. Thats why they make that neat little carbon fouling removal tool. Link to comment Share on other sites More sharing options...
Beangun Posted November 15, 2021 Author Report Share Posted November 15, 2021 It looks very clean to me but where do you find one of them tools Link to comment Share on other sites More sharing options...
StrangeRanger Posted November 15, 2021 Report Share Posted November 15, 2021 I don't know crap about BARs but is it possible to build up enough ash in the gas tube that the bolt will remain closed and the cocking handle will not be able to retract the slide/piston? I realize the handle has no mechanical advantage but I would expect the piston to scrape the worst of the carbon as it cycled. There may be something a lot worse going on here Link to comment Share on other sites More sharing options...
Roland the Thompsongunner Posted November 15, 2021 Report Share Posted November 15, 2021 Check the chamber also empty casings may be sticking . Had this on a couple barrels with pitted chambers. They load and unload fine if just cycling the gun but when you fire it pushes the brass case out into every little imperfection and they get stuck Link to comment Share on other sites More sharing options...
emmagee1917 Posted November 15, 2021 Report Share Posted November 15, 2021 Strip her down and look at the front of the receiver where the gas piston rod / block goes through . Is the rectangular cut for that centered or off to one side ? The thickness of the receiver walls on each side should be the same . If one side is much thicker than the other it is one of the mis-machined ones .Chris And yes , a bit of beach sand on the gas piston can lock up a BAR lickity split . Ask any Marine BAR man . Link to comment Share on other sites More sharing options...
BRMCII Posted November 15, 2021 Report Share Posted November 15, 2021 Look carefully at your fired cases. Note striations, and irregularities in the outer wall, etc. inspect chamber with bright light to confirm it is smooth, no pits, etc. Lube your cases and test fire..... Link to comment Share on other sites More sharing options...
Beangun Posted November 15, 2021 Author Report Share Posted November 15, 2021 Check the chamber also empty casings may be sticking . Had this on a couple barrels with pitted chambers. They load and unload fine if just cycling the gun but when you fire it pushes the brass case out into every little imperfection and they get stuck Link to comment Share on other sites More sharing options...
Beangun Posted November 15, 2021 Author Report Share Posted November 15, 2021 It is one of the mis machined ones. There is very little difference in the sides of the receiver. Didnt learn this until after I bought it. Was hoping it wasnt bad enough to cause any problems. Gun has never jammed and bolt didnt start sticking until I got about 150 rounds thru it Link to comment Share on other sites More sharing options...
nate129 Posted November 15, 2021 Report Share Posted November 15, 2021 Not sure is an off center gas tube is easily repairable...I'd you need a BAR gunsmith I would recommend John Andrewski in New Hampshire. Pm me if you need his info. Link to comment Share on other sites More sharing options...
emmagee1917 Posted November 15, 2021 Report Share Posted November 15, 2021 I agree . He makes ( or made ) an offset rod that relocates the piston back to the center of the gas tube . A friend of mine has one as well , his rod fixed her right up .Chris Link to comment Share on other sites More sharing options...
Beangun Posted November 16, 2021 Author Report Share Posted November 16, 2021 Yes his info would be great. Thanks Link to comment Share on other sites More sharing options...
deerslayer Posted November 16, 2021 Report Share Posted November 16, 2021 (edited) I'd be curious if the Piston is sticking in the gas tube or something internal is causing the jam. Next time it jams you could try sliding the gas tube forward before you try pulling back on the bolt. See if the Piston is indeed sticking. You also didn't say if it's jamming with a stuck empty case or unfired live round, or an empty chamber. Edited November 16, 2021 by deerslayer Link to comment Share on other sites More sharing options...
Beangun Posted November 16, 2021 Author Report Share Posted November 16, 2021 I will try that and it is getting stuck with a fired empty case Link to comment Share on other sites More sharing options...
StrangeRanger Posted November 16, 2021 Report Share Posted November 16, 2021 If the tube comes off easily then the next time you have it apart look for worn pivot pins or elongated holes in the bolt, locking piece, link etc. It's possible that something has developed enough play to allow it to lock up Link to comment Share on other sites More sharing options...
damifino Posted November 16, 2021 Report Share Posted November 16, 2021 I found this BAR animation. Only note, the red pin that cams the bolt link up, would be the radius on the end of the bolt rail. Link to comment Share on other sites More sharing options...
deerslayer Posted November 16, 2021 Report Share Posted November 16, 2021 So you have a fired empty round in the chamber. Sounds like it's not ejecting the round then rechambering the empty which is normally tight after being fired. Try putting a fresh empty in the chamber and letting the bolt slam forward. It will stick. Are the normal fired cases landing by your feet or off to the side a ways. Link to comment Share on other sites More sharing options...
Beangun Posted November 17, 2021 Author Report Share Posted November 17, 2021 Alright I went and fired the gun today to refresh my memory what was happening for sure. Its been a couple months since I shot it. The bolt gets stuck forward with no shell in chamber. You can release the bolt without loading a round into the chamber and it will 4 times out of 5 get stuck forward and you have to hit the butt stock pretty good on something. I have some pictures of two casing I fired today and will try to upload them on here. Link to comment Share on other sites More sharing options...
Beangun Posted November 17, 2021 Author Report Share Posted November 17, 2021 Alright I went and fired the gun today to refresh my memory what was happening for sure. Its been a couple months since I shot it. The bolt gets stuck forward with no shell in chamber. You can release the bolt without loading a round into the chamber and it will 4 times out of 5 get stuck forward and you have to hit the butt stock pretty good on something. I have some pictures of two casing I fired today and will try to upload them on here. Link to comment Share on other sites More sharing options...
Beangun Posted November 17, 2021 Author Report Share Posted November 17, 2021 Took the gun apart the the guide rod didnt seem stuck at all and bolt moves freely in the receiver with the trigger group off Link to comment Share on other sites More sharing options...
Beangun Posted November 17, 2021 Author Report Share Posted November 17, 2021 Turns out I didnt know how to fully clean my gun lol. The gas tube and regulator definitely needed to be cleaned and that seemed to fix my bolt getting stuck forward. Thanks for all the help guys. There is a lot more to a BAR than any gun Im used to. Link to comment Share on other sites More sharing options...
BPinFL Posted November 17, 2021 Report Share Posted November 17, 2021 Also clean the piston! Link to comment Share on other sites More sharing options...
jim c 351 Posted November 17, 2021 Report Share Posted November 17, 2021 Beangun,Looks like you have solved the problem, that is, unless you have more than one issue.The top empty case caught my eye. I appears to retain a roll crimp. If the cartridges are longer than specs the empty case will expand into the forcing cone and stick in the chamber.What ammo are you using and is the case length within specs????Jim C Link to comment Share on other sites More sharing options...
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