Our new spiked muzzle brake for the Cobray M-11 SA 9mm is made of machined steel and finished in black oxide for durability. It has five machined, slotted ports and its' crown works great for door breach situations, self defense and adds a custom appearance to any M-11 Semi Auto & SMG. It is 3" inches in length and weighs only 5 ounces. It has a thread of 3/4x10, fits 9mm only. (gun & other parts sold separately) Also fits MPA Mid Sized 9mm pistols & Mac-10 9mm.