Weaver's precision-built all steel bases are machined to tight tolerances for a custom fit and a square-cut notch mates to the sturdy cross bolt in every Weaver Detachable ring. Custom hardened fastening screws included. - Fits: - Anschutz 1568 (Rear base ONLY.) - Cil Models 950 & 950-C (Rear base ONLY.)li>Ithaca Models LSA-55 & LSA-65 - Modern Muzzle Loading Knight Models MK-85 BK-92 & T-Bolt (Flat receiver) - Sako Whitetail Hunter - Savage Models 10 12 (but not 12 BVSS) 16 510 512 & 516 Short Action Rifle 110 (E & S) 111 112 (R V & FV) 116 FSS (Long Actions); 210 Shotgun - use X-high rings; Striker Pistol (Rear base ONLY.) - Shilen Flat Top Receivers - Stevens Model 110E (Rear base ONLY.) - Tikka Flat Receiver