Mark 4 Tactical Bases are the only bases to accommodate both the oversized 8-40 screw and a 6-48 screw, providing compatibility with the widest range of modern tactical firearms. Both styles of screws are included with each Mark 4 base.
Specifications and Features :
Manufacturer Number: 59235
System employs a slot and spline design
Accepts Mark 4 rings, cross-slot rings, and QRW / PRW rings and any weaver and Picatinny compatible rings
Rugged steel construction
Matte black finish
Made in the U.S.A.
Remington Model 700 short action rifles