This matte black aluminum extension base set fits select firearms. The extension base allows an extra 0.689 inches. For the Savage/Stevens 200 with shorter tube scopes or red dot scopes use the #402 extension front base or a one-piece base if available.
Rear extension base for Navy Arms Country Boy Muzzleloader, Savage Axis Series, 10, 12, 110 and 112 (all long action AccuTriggers), 10, 12, 110 and 112 (all short action AccuTriggers), 10 ML II, Stevens Savage/Stevens 200 and Winchester 52 with the same hole spacing
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 and Enfield Winchester 70
Front extension base for Savage Axis Series, 10, 12 and 16 (short actions), Striker, Pistol, 510, 512, 516 S/A and 10 ML (2-piece only) pre-2003 models, 110, 112 and 116 (long actions), 210 Shtg (use X-high rings) pre-2003 models, 10, 12, 110 and 112 (all long action AccuTriggers and short action AccuTriggers) and 10 ML II
Front extension base for Sears 53, Stevens 110E and Savage/Stevens 200
Front extension base for Winchester 52 with the same hole spacing, 70 Long Action with the same hole spacing, 670, 770, 70 Short Action (1984+) and 70 WSM
The Winchester 52 with the same hole spacing may require bolt and/or safety alteration, otherwise the firearm cannot function safely and properly. Consult 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
