The Salmon River Solutions Tikka T3x 20 MOA scope rail is ultralight and ultra-low profile. Designed with round extraction in mind, SRS engineers removed the center picatinny lugs and scalloped the center to leave as much space at the ejection port as possible. This leaves you with the best looking, best functioning, and lightest rail on the market. FeaturesMade from 7075 aluminum and black anodizedComes with (4) 6-48 t10 bolts and (1) 3mm recoil pinTorque bolts to 15 in/lbs and use blue loctite