Fits:
- Rear Extension Base for:
- Navy Arms Country Boy Muzzleloader
- Savage Axis Series, 10, 12, 16 (short actions)
- Striker Pistol
- Savage Model 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 70H&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
