Weaver Aluminum Top Mount Black Marlin 455-mr7-402 Weaver

Rear Extension Base for:
Navy Arms Country Boy Muzzleloader.
Savage Axis Series, 10, 12, 16 (short actions); Striker; Pistol; 510, 512, 516 S/A, 10 ML (2-piece only) pre-2003 models; 10, 12, 110, 112 (all long action AccuTriggers); 10, 12, 110, 112 (all short action AccuTriggers); 10 ML II.
Stevens Savage/Stevens 200.

Front Extension Base for:
Anschutz 1568.
Browning Bolt Action BBR, Hi-Power, other calibers (older models), BBR (Bolt Action), long and short actions.
Churchill 950, 950-C, 972-C.
Marlin 455, MR7.
Mauser 1.4″ diameter receiver ring (98FN), 1.3″ diameter receiver ring (Swedish 96), Bauer 3000, 4000.
Musgrave Mark I, Mark II, Mark III, Mark IV.
Navy Arms Country Boy Muzzleloader.
Parker-Hale 1000, 1000C, 1100, 1200, 1700.
Colt 57.
Cooey 71.
Enfield Winchester 70.
H&R 300, 301, 330, 370 (pre-1973); 300, 301 L.A. in 270, 30-06, 7mm, 300 Win (1973+).
Herters J9.
High-Standard High-Power.
Interarms Viscount.
Savage Axis Series, 10, 12, 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 AccuTrigger); 10, 12, 110, 112 (all short action AccuTrigger); 10 ML II.
Schultz & Larsen.
Sears 50, 51, 51L, 53.
Smith & Wesson Mauser Actions with small rectangular ring with 1.3″ diameter.
Stevens 110E, Savage/Stevens 200.
Voere 2150, 2165/1, 2165/2, 2165/3 & 2165/4 (Mauser Action).
Weatherby FN Mauser style actions.
Winchester 52 with the same hole spacing; Lever Actions 53, 55, 64, 65, 66, 71, 1886, 1892, 95, 1895, 54, and early models; 70 with serial number below #66 350; 70 Long Action with the same hole spacing; 670, 770, 70 Long Action with different hole spacing, 70 Super Express, 70 Short Action (1984+), 70 Long Action with different hole spacing, 70 Super Express, 70 Short Action (1984+), 70 WSM.
Notes
For the Mauser 1.4″ diameter receiver ring (98FN), 1.3″ diameter receiver ring (Swedish 96), and Bauer 3000 and 4000 shimming is probably required for perfect scope alignment. The rear base may require modifications for a correct fit to military actions.
Savage 110, 112, 116 (long actions); 210 Shtg (use X-high rings) pre-2003 models, 10, 12 & 16 (short actions); Striker, Pistol, 510, 512, 516 S/A, 10 ML (2-piece only) pre-2003 models, 10, 12, 110, 112 (all long action AccuTrigger), 10, 12, 110, 112 (all short action AccuTrigger), 10 ML II, 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 same hole spacing may require bolt and/or safety alterations, 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.
The Winchester Lever Actions 53, 55, 64, 65, 66, 71, 1886, 1892, 95, and 1895 will have to be drilled and tapped.
The Winchester 54, early Models, and 70 with serial numbers below #66 350 may require bolt and/or safety alterations or the firearm will not function safely and properly. Consult with a qualified gunsmith.
For the Winchester 70 Long Action with the same hole spacing, 670, 770, 70 Long Action, 70 Long Action with different hole spacing, 70 Super Express with different hole spacing, and 70 Super Express the handiest way to pinpoint the correct base for the Winchester 52 & 70 Long Action Rifles is to check the spacing of the tapped holes for the rear base and compare it to the hole spacing for the front base. If the hole spacing is the same, then use 46+ 46 for Model 52 and use 47+ 46 for Model 70. If the hole spacing is different, use 25+ 57 for Model 52 and 49A+ 46 for Model 70.

Features:Aluminum base;Machined to tight tolerances for a custom fit