smokeymcfats

Has anyone tried the new Witt Machine MRE muzzle brake? From what i've read they reduce a lot of recoil while not increasing muzzle blast.

Okay, so i just got in my AP4, and want to get a drop-in carbine length quad rail for her. Don't need one that's super expensive, just something for the time being until i sell off some junk and can replace the gas block and get a longer rail. I tried one from Double Star and the outside diameter was too big and wouldn't fit (it was for an ar15 so i figured it would have dropped right in). Anyone know what carbine length rail will fit this beast?