This muzzle brake (compensator) is made from top quality steel, precision turned, knurled, bored and ground, then finished in black oxide. Threaded M14 X 1 RH to fit ORIGIONAL VZ58 and Yugo SKS rifles. It has a large expansion chamber and gas ports beyond the threads that make it very effective in reducing muzzle rise. Also, the threads are undercut so that it will fit on rifles with longer than standard muzzle lengths. Counts as 1 US 922r compliant part.......................PLEASE NOTE: This listing .. is for 1 (one) Muzzle Brake I used two in the photo .............................................................................................................THIS IS WHAT U NEED TO KEEP THAT SHORT BARREL VZ58 LEGAL. THE MUZZEL BRAKE THAT YOU NEED TO BE COMPLIANT. THIS BABY NEEDS TO BE SILVER SOLDERED BLIND PINNED OR WELDED ONTO BBL. THESE THREADS ARE STANDARD- 14X1 MM RH. DIE. ..AND MEASURES 2 9/16" LONG..7/16" WIDE..... WILL ONLY WORK ON ORIGINAL CZECH VZ58 BARRELS..... . THIS BRAKE WILL FIT ORIGINAL CZECH BARRELS WITHOUT ISSUE, BUT MANY CENTURY VZ2008 OWNERS HAVE EXPERIENCED ISSUES WITH SCREWING THIS BRAKE ONTO THEIR BARREL THREADS. JUST A HEADS-UP THAT THERE IS A LIKELY CHANCE THAT …………..THIS BRAKE WILL NOT FIT THE CENTURY VZ2008 RIFLE ……..THE BRAKE MAY NOT FIT THE VZ2008...............AS SOME CENTURY VZ2008 HAD OVERSIZE THREADS AND SOME OF THESE RIFLES ARE THREADED LEFT HAND (OPPOSITE OF ORIGINAL VZ.58 THREADED MUZZLES). IF YOU PURCHASE THIS BRAKE, AND IT DOES NOT FIT YOUR CENTURY VZ2008, THIS IS THE REASON....