Just like the traditional Black Rain Ordnance MFR, this Muzzle Flash Regulator is great for pistols and short barrel builds. The Master Key model has Indexing V-slots and a much more aggressive profile than our traditional MFR.
WEIGHT: 9.2 oz
LENGTH: 3.5″
OUTSIDE DIAMETER: 1.375″
CAL: 5.56
THREAD: 5.56: 1/2-28
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