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# 74MB5028 - For 1/2-28 RH barrels ** - common for most AR's and some AK's with 0.500" to 0.520" barrel o.d.'s

# 74MB1410 - For 14x1 LH barrels - common for most AK's, 7.62x39 Saiga and some newer .223 Saigas with 0.551" to 0.569" barrel o.d.'s

# 74MB1510 - For 15x1 RH barrels - common for .223 with 0.591" barrel under FSB

# 74MB6324 - For 5/8-24 RH barrels - common for .308 Saiga with 0.631" barrel under FSB

# 74MB1710 - For 17x1 RH barrels - common for .308 Saiga with 0.671" barrel under FSB or cut back barrels

This is a '74 style muzzle brake that is threaded 1.00" deep. These are all safe for calibers up to 0.308". The Saiga 7.62x39 and .223 rifles have 1" of barrel out in front of the front sight block, so this brake has been threaded deeper to account for this. Normally AK barrels stick out 9/16" in front of the FSB tower and the brakes are threaded 5/8" to 3/4" deep inside. **note: the 1/2-28 is not threaded 1.00" deep, only standard depth.

Also, the Saiga .308 barrels have a taper on the end and most brakes/hiders will not clear it. All of these brakes will.

These are marked "U.S.A." or "Made In USA" and count as a compliance part.

You may also want to rent one of my Threading Kits and use a Crush Washer or Muzzle Nut to index the brake properly. I also have Thread Protectors available as well.