Uncle Mikes magazine cap swivel set has a factory magazine cap with the swivel base already installed. Just unscrew the factory magazine cap and replace it with the new cap. For the buttstock, a 3/4″ wood screw swivel base is included, along with two super swivels with Tri-Lock.
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TacFire MZ1020SS Linear Compensator Stainless Steel with 1/2″-28 tpi Threads, 2.05″ OAL & 0.87″ Diameter for 5.56x45mm NATO AR-15
$17.00
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