Can anyone tell me if Dead Air is having QC issues with muzzle devices?  Have a Keymo Brake and Sandman K on a 10.3" mk18 cloneish and I definitely expected a lot of wear on the MD (and just dirtiness in general from such a short set up) but i did not expect as much rust on the MD as i am currently dealing with.  Of the 3000 rnds or so i have through this gun id say 90% of them were m855/193 and the rest either Remington or Winchester megapacks.  somewhere around 1500 rounds i had the can carbon lock on and had to use channel lock pliers to remove it and the MD had a bunch of rust on it so I brushed the MD with CLP then worked the can on and off a few times and since have not had any carbon lock issues but the rust will not stop.

Post some pictures so we see what you’re talking about here if you could.

Contact DA and include pics.  Bet they take care of you.

This.