These rings are machined from solid steel, they offer superior integrity and tighter tolerances that are based on the proven cross-slot design. Use Leupold PRW bases or any other Picatinny style mount rails.

Features:

• 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
• Securely attach your scope to any M16 variant with a carrying handle using this rugged mount, delivers rock-solid stability for repeatable accuracy, use with Leupold QRW mounts
• Secure your Mark-4 CQ/T scope to any Picatinny style mounting rail using this specially designed mounting bracket, 2-rugged cross-slot bolts secure the bracket for rock-solid durability
• Mark-4 bases are available for nearly every long-range tactical weapon in use, including Remington 700, 721, and 725 long and short action models, Winchester model 70, 670, 770, and 70A, Savage 110 through 116, and Savage 10 through 16
• Mark-4 bases accept Mark-4 rings, cross-slot rings, and QRW/PRW rings
• Get a precise and repeatable zero every time with this quick-detaching mount for the Leupold Mark-4 CQ/T optical sight
• With rugged, all-metal construction and a black, anti-glare matte finish, it's ready to handle any mission, fits all MIL-STD-1913/Picatinny style rails
• System employs a slot and spline design, and comes in 1-piece and 2-piece configurations