col.1981
03-07-13, 22:43
Most 5.45 AR uppers I've saw have some sort of corrosion resistance (NiB, melonite). That probably wouldn't keep me from washing things out like I would normally after shooting corrosive ammo. But, do you guys that are actually running these uppers rinse out the lower too? Specifically DI guns since some gas from the carrier will get in the lower.