.308 Operating, Safety and Instruction Manual

[imschur]

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 Rifles

1051_.pdf

[SWshooter]

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.

[mrmackc]

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,

[98Z5V]

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.

[Robocop1051]

A gas tube is good for thousands of rounds without cleaning. At that point, $10-25 will buy you a needed replacement.

[blue109]

never once have I cleaned a gas tube....

[Rsquared]

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.

[planeflyer21]

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!

[shibiwan]

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....

[mrmackc]

Thanks for the info it looks like that is something else I don't have to worry about.

HAPPY SHOOTING

[Wayne todd]

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?

[jtallen83]

@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