Grovtec Side-By-Side Double Barrel Swivel Set 1″ Loops Black

Drill and tap for mounting of custom swivel stud base between barrels. Also includes 3/4" wood screw stud rear and one pair GT Locking Swivels.WILL NEED TO BE DRILLED AND TAPPED FOR #4-48

Check clearance between barrels prior to drilling.

Drill with a No. 44 drill (.086) dia. by approximately (.180) deep.Use a #4-48 UNF-2 bottom tap to thread holes. CAUTION:Use lubricant to tap and clean out chips regularly.