This spacer disables the movement in the Nielsen device so the Osprey can be used with guns with fixed barrels. Made from 17-4 stainless steel then heat treated for maximum durability.
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Yankee Hill 3102-1MB-28A Mini Phantom Q.D. Muzzle Brake Black Melonite Steel with 1/2″-28 tpi Threads & 1.60″ OAL for 5.56x45mm NATO AR-Platform
$97.00
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