Pinned Muzzle device.

[ShotgunKirk]

Ok if this has been covered already please forgive my noobness.
Maybe this is a dumb thing to ask but my question I have for today is:
I shoot ALOT of corrosive ammo and everytime I clean my AK I remove the slant break and there is always a fair amount of carbon or crap or whatever the hell it is on the end of barrel. One time I didn;t clean it right away and I had to use damn lockjaws to get the break off 'cause it started rusting.. now what if you had for example a short barrel w/ a perm attached long muzzle device to make it the legel 16 inches. Anyone with any insight on this? I'm not going to stop shooting corrosive ammo and I'm worried that this would effect the crowning of the barrel if it built up rust (which i'm sure it would) as it did inbetween the end of my barrel and the slant break.

Thanks to all for this great sight and for being responsible adults.
God bless America.

[Blacksmith]

I’ve cleaned a lot of crap off the crowns of used weapons that were cut up into parts kits. It’s apparent that many militaries do not have good cleaning habits. The buildup does effect accuracy. But all of them I cleaned up had Chrome lined barrels. And the crowns cleaned up nice and showed zero corrosion. However the threads did show some pitting. but it was strictly cosmetic and did not effect the function or accuracy.

My take on it is there is always a way to clean the crown, even with the Muzzle device permanently affixed. But the threads will eventually corrode through. So you can either preserve it by shooting clean ammo and spending the extra time cleaning and oiling it. Or spring for the SBR stamp. and get rid of the goofy extension.

[BKLYN_C]

It's not the carbon that is the problem. It is the humidity, the water in the air that causes corrosion. With corrosive ammo salts get deposited with carbon and process of corrosion accelerates. Generously apply oil onto unreachable parts and store the rifle in a dry place.

[Rudy]

I used to shoot corrosive ammo. I was always told to make sure the last 6-12 shots were noncorrosive. The reason being is that helped blow away the corrosive salts and cleaned out the gas system.