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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Sig Sauer SL55612X2825DEGF Clutch-Lok QD Flash Hider Black Stainless Steel with 1/2″ 28 tpi Threads 2.10″ OAL for 5.56mm Sig Taper Lok Barrels
$149.99
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