imschur Posted November 6, 2010 Report Share Posted November 6, 2010 Theres a wealth of info in this Bushmaster .pdf As you all know the bushy is a DPMS so it should apply to the DPMS LR-308 Rifles1051_.pdf Quote Link to comment Share on other sites More sharing options...
SWshooter Posted November 7, 2010 Report Share Posted November 7, 2010 I read through the manual and it is pretty good. The only info I question is the "pull through" cleaning method. This will expose the rifling at the crown to wear by the cleaning rod, which is exactly what we're trying to avoid by cleaning from the chamber end of the barrel. Quote Link to comment Share on other sites More sharing options...
mrmackc Posted December 9, 2014 Report Share Posted December 9, 2014 Okay folks, I have been reading the owner's manual instruction book for: DPMS modern sporting rifle. I must have missed something. I see about cleaning the bolt key (bad nomenclature) but nothing inside the complete gas tube or the gas block. It gets kind of nasty after shooting a couple of magazines of Remington 150 grain factory ammo. What is the best way to clean the gas tube and gas block? I downloaded the Bushmaster manual, it is good but nothing on the gas tube. Thanks, Quote Link to comment Share on other sites More sharing options...
98Z5V Posted December 9, 2014 Report Share Posted December 9, 2014 Carb cleaner through it, or put the thing in a solvent tank and run solvent through it. Or, don't worry about it. The pressure of the "process of shooting" will keep blowing the junk back into your gas key on top of the BCG, and contaminate the bolt tail. Clean those areas well based on whatever cleaning schedule you have, and you'll be good to go. Quote Link to comment Share on other sites More sharing options...
Robocop1051 Posted December 9, 2014 Report Share Posted December 9, 2014 A gas tube is good for thousands of rounds without cleaning. At that point, $10-25 will buy you a needed replacement. Quote Link to comment Share on other sites More sharing options...
blue109 Posted December 9, 2014 Report Share Posted December 9, 2014 never once have I cleaned a gas tube.... Quote Link to comment Share on other sites More sharing options...
Rsquared Posted December 9, 2014 Report Share Posted December 9, 2014 Yep. I gotta agree. I don't ever even think about cleaning the gas tubes. Like others have said, they either clean themselves out, or are cheap enough to replace if need be. Quote Link to comment Share on other sites More sharing options...
planeflyer21 Posted December 9, 2014 Report Share Posted December 9, 2014 never once have I cleaned a gas tube.... Never once have I replaced a gas tube. You guys surprise me with all this "worn parts replacement". So it goes full-auto when you pull the trigger sideways...saved $200 on a tax stamp! Quote Link to comment Share on other sites More sharing options...
shibiwan Posted December 9, 2014 Report Share Posted December 9, 2014 Never once have I replaced a gas tube. You guys surprise me with all this "worn parts replacement". So it goes full-auto when you pull the trigger sideways...saved $200 on a tax stamp! ....and then the ATF will be all over your ass.... Quote Link to comment Share on other sites More sharing options...
mrmackc Posted December 9, 2014 Report Share Posted December 9, 2014 Thanks for the info it looks like that is something else I don't have to worry about. HAPPY SHOOTING Quote Link to comment Share on other sites More sharing options...
Wayne todd Posted November 3, 2019 Report Share Posted November 3, 2019 Just purchased a used ar 10. It blows the cases just ahead. Of the rim and blows gas out the mag well. It appears not to be locking up. Thoughts? Quote Link to comment Share on other sites More sharing options...
jtallen83 Posted November 3, 2019 Report Share Posted November 3, 2019 (edited) @Wayne toddFirst off don't shoot it until the headspace is checked! Some pictures of a blown out case, the lugs on the bolt(the lockup surface on the back side), and as good a shot inside the extension as you can get. What are you using for ammo? Edited November 3, 2019 by jtallen83 Quote Link to comment Share on other sites More sharing options...
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