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.
Online Only

Sig Sauer SL55612X2890DEGM Clutch-Lok QD Muzzle Brake Black Stainless Steel 1/2″x28 Threads 5.56x45mm NATO
$149.99
Reviews
There are no reviews yet.