Rear Extension Base for: Navy Arms Country Boy Muzzleloader; Savage Axis Series, 10, 12, 110, 112 (all long action AccuTriggers); 10, 12, 110, 112 (all short action AccuTriggers); 10 ML II; Stevens Savage/Stevens 200; Winchester 52 with the hole spacing the same Front Extension Base for: Anschutz 1568; Browning BBR Bolt Action (long and short actions); Churchill 950 and 950-C; Marlin MR7; Navy Arms Country Boy Muzzleloader; Cooey 71; Enfield Winchester 70; Savage Axis Series, 10, 12, and 16 (short actions); Striker, Pistol, 510, 512, 516 S/A, 10 ML (2-piece only) pre-2003 models; 110, 112, 116 (long actions); 210 Shtg (use X-high rings) pre-2003 Models; 10, 12, 110, 112 (all long action AccuTriggers), 10 ,12 ,110, 112 (all short action AccuTriggers); 10 ML II; Sears 53; Stevens 110E, Savage/Stevens 200; Winchester 52 with the hole spacing same; 70 Long Action with the hole spacing same, 670, 770, 70 Short Action (1984+), 70 WSM. **Note**: For the Stevens Savage/Stevens 200 or shorter tube scopes or red dot scopes use #402 extension front base or one-piece base if available. Extension base allows an extra 0.689". The Winchester 52 with the hole spacing same may require bolt and/or safety alteration, otherwise firearm cannot function safely and properly. Consult with a qualified gunsmith. For the Winchester 52 and Winchester 70 Long Action Rifles, check the spacing of the tapped holes for the rear base and compare it to the hole spacing for the front base. For the same hole spacing, Model 70, use 47+ 46. Features:Aluminum;Matte black
