The Talley Modern Sporting (TMS) Ring is a solution for your Picatinny rail system with a clean and simplified appearance. These picatinny scope rings are designed to work with any rail designed to MIL-STD-1913 picatinny rail specs. Machined from aircraft grade alloy with a black anodize finish, the TMS Scope ring is gaining popular in the firearms industry as the next great, cost effective, AR 15 Scope ring. Whether you have an aftermarket picatinny rail system on a modern sporting rifle or an AR-15-style rifle, these scope rings designed to accommodate all shooters.Features : American Made, Lightweight Alloy Picatinny Rail Scope Mounts Fully CNC Machined High-Grade Lightweight Aircraft Aluminum Meets MIL-STD-1913 picatinny rail specs Lapping Not Required/voids warranty Sold in pairs