I repaired an aluminum gas block setup at a recent carbine course at LMS Defense. The student started seeing holes in his gloves! Surprisingly, the gun continued to function, however the hold on the rifle became painful after using it for a few drills. We took the gun down, and noticed that the aluminum gas block had eroded out the side from use, and formed a plasma torch of sorts. It actually melted a slot into the troy rail, and started to chew threw the students gloves. We broke the rifle down, replaced block with a titanium unit off my backup gun and continued on.
Ryan