GRAND SLAM BASES Reviews & Ratings

High strength, steel bases to fit a wide range of modern and older rifles plus, some long range handguns. Sold each, order front and rear base. Front and rear extension bases provide added flexibility for mounting all types of scopes.

S35 Base fits BSA - Monarch med./long action. S36: Rear; S35: Front. Churchill - Highlander. S36: Rear; S35: Front. Colt – Sauer. S35: Front & Rear. Enfield – Receiver cut down like: Remington 721. S36: Rear; S35: Front. H&R – 317, 322. S35: Front. Herter’s – U-9 round receiver. S36: Rear; S35: Front. Howa – 1500. S36: Rear; S35: Front. Mossberg – 1500, 1550, 1700. S36: Rear; S35: Front. Raptor Arms – 700 Action. S36: Rear; S35: Front. Remington – 700 Long Action, 78, 40-XL, 721, 725, 700 Short Action, 700ML. S36: Rear; S35: Front. Ruger – 77 Round Top. S35: Front. Sauer – 200. S35: Front & Rear. Shilen – Round Receiver. S35: Front & Rear. Smith & Wesson – 1500, 1600, 1700. S36: Rear; S35: Front. Weatherby – Mark V, Vanguard. S36: Rear, S35: Front.

S36 Base fits BSA – Monarch med./long action. S36: Rear; S35: Front. BSA – Monarch med./long action, R/ext. S36: Rear; S40A: Front. Churchill – Highlander. S36: Rear; S35: Front. Churchill – Highlander, R/ext. S36: Rear; S40A: Front. Enfield – Receiver cut down like: Remington 721. S36: Rear; S35: Front. Enfield – Receiver cut down like: Remington 721, R/extension. S36: Rear; S40A: Front. Herter’s – U-9 round receiver. S36: Rear; S35: Front. Herter’s – U-9 round receiver, R/extension. S36: Rear; S40A: Front. Howa – 1500. S36: Rear; S35: Front. Howa – 1500, F/extension. S36: Rear; S40A: Front. Mossberg – 1500, 1550, 1700. S36: Rear; S35: Front. Mossberg – 1500, 1550, 1700, R/extension. S36: Rear; S40A: Front. Raptor Arms – 700 Action. S36: Rear; S35: Front. Raptor Arms – 700 Action F/extension. S36: Rear; S40A: Front. Remington – 700 Long Action, 78, 40-XL, 721, 725. S36: Rear; S35: Front. Remington – 700 Short Action, 700ML. S36: Rear; S35: Front. Remington – 700 Short Action, 700ML. S36: Rear; S40A: Front. Smith & Wesson – 1500, 1600, 1700. S36: Rear; S35: Front. Smith & Wesson – 1500, 1600, 1700, R/extension. S36: Rear; S40A: Front. Weatherby – Mark V, Vanguard. S36: Rear; S35: Front. Weatherby – Mark V, Vanguard F/extension. S36: Rear; S40A: Front. Weatherby – Mark V 22-50, 224, 30-06. S36: Rear; S46 : Front.

S40A Base fits BSA – Monarch med./long action, R/ext. S36: Rear; S40A: Front. Churchill – Highlander, R/ext. S36: Rear; S40A: Front. Colt – Sauer F/extension. S40A: Front & Rear. Enfield – Receiver cut down like: Remington 721, R/extension. S36: Rear; S40A: Front. H&R – 317, 322, R/extension. S40A: Front. Herter’s – U-9 round receiver, R/extension. S36: Rear; S40A: Front. Howa – 1500, F/extension. S36: Rear; S40A: Front. Mossberg – 1500, 1550, 1700, R/extension. S36: Rear; S40A: Front. Raptor Arms – 700 Action F/extension. S36: Rear; S40A: Front. Remington – 700 Short Action, 700ML. S36: Rear; S40A: Front. Sauer – 200, F/R/extension. S40A: Front & Rear. Shilen – Round Receiver, F/R/extension. S40A: Front & Rear. Smith & Wesson – 1500, 1600, 1700, R/extension. S36: Rear; S40A: Front. Weatherby – Mark V, Vanguard. S36: Rear; S35: Front. S402 Base fits Browning – BBR long & short action. S47: Rear; S46: Front. CIL – 950, 950C F/extension. S61: Rear; S402: Front. CIL – 972-C F/extension. S45: Rear, S402: Front. Colt – 57 F/extension. S45: Rear; S402: Front. Cooey – 71 F/extension. S402: Front. Enfield – Receiver cut down like: Winchester 70, F/extension. S402: Front. H&R – 300, 301 long action pre-1973. S45: Rear; S402: Front. H&R – 300, 301 long action post 1973. S46: Rear; S402: Front. Herter’s – J-9 FN action, F/extension. S45: Rear; S402: Front. Marlin – MR-7, F/extension. S402: Front. Mauser – model 98 F/extension. S45: Rear; S402: Front. Mauser – 95, 96 F/extension. S55: Rear; S402: Front. Musgrave – Mark I, Mark II. S54: Rear; S402: Front. Musgrave – Mark III, Mark IV, F/extension. S45: Rear; S402: Front. Savage – 10 & 110 Series F/extension. S61: Rear; S402: Front. Sears – 53, F/extension. S402: Front. Voere – 2150, 2165, Mauser Action. S45: Rear; S402: Front. Voere – Mauser Action R/extension. S45: Rear; S402: Front. Winchester – 670, 770, F/extension. S402: Front.

SPECS: Steel, blue, matte finish. Fits Weaver Grand Slam, Top Mount, Tip-Off and See-Thru Mount Rings. Includes screws.

S45 Base fits CIL – 972-C. S45: Rear; S46: Front. CIL – 972-C F/extension. S45: Rear, S402: Front. Colt – 57. S45: Rear; S46: Front. Colt – 57 F/extension. S45: Rear; S402: Front. H&R – 300, 301 long action pre-1973. S45: Rear; S402: Front. Herter’s - J-9 FN action. S45: Rear; S46: Front. Herter’s – J-9 FN action, F/extension. S45: Rear; S402: Front. Knight – LK-93, Wolverine, Legend, Disc. S45: Front & Rear. Mauser – 455. S45: Rear; S46: Front. Mauser – FN, HVA, model 95, 98 large ring. S45: Rear; S46: Front. Mauser – model 98 F/extension. S45: Rear; S402: Front. Mauser – Viscount. S45: Rear. Musgrave – Mark III, Mark IV. S54: Rear; S46: front. Musgrave – Mark III, Mark IV, F/extension. S45: Rear; S402: Front. Parker Hale – 1000, 1000C, 1100, 1200, 1700. S45: Rear; S46: Front. Sears – 50, 51 FN action. S45: Rear; S46: Front. Springfield – 03-A3. S45: Front. Voere – 2150, 2165, Mauser Action. S45: Rear; S402: Front. Voere – Mauser Action R/extension. S45: Rear; S402: Front.

S46 Base fits Anschutz – 1568. S61: Rear; S46: Front. Browning – BBR long & short action. S47: Rear; S46: Front. CIL – 950, 950C. S61: Rear; S46: Front. CIL – 972-C. S45: Rear; S46: Front. Colt – 57. S45: Rear; S46: Front. Cooey – 71. S47: Rear; S46: Front. Enfield – Receiver cut down like: Winchester 70. S47: Rear; S46: Front. H&R – 300, 301, 330, 370 before 1973. S45: Rear; S46: Front. H&R – 300, 301 long action after 1973. S45: Rear; S46: Front. H&R – 300, 301 long action post 1973. S46: Rear; S402: Front. Herter’s - J-9 FN action. S45: Rear; S46: Front. High Standard – Hi-Power. S55: Rear; S46: Front. Marlin – MR-7. S47: Rear; S46: Front. Mauser – 455. S45: Rear; S46: Front. Mauser – Bauer 3000, 4000. S46: Front. Mauser – FN, HVA, model 95, 98 large ring. S45: Rear; S46: Front. Mauser – HVA, Swedish 96 small ring. S55: Rear; S46: Front. Musgrave – Mark I, Mark II. S54: Rear; S46: Front. Musgrave – Mark III, Mark IV. S54: Rear; S46: front. Navy Arms – Country Boy. S46: Front & Rear. Parker Hale – 1000, 1000C, 1100, 1200, 1700. S45: Rear; S46: Front. Savage – 110, 116, 10, 11, 12. S61: Rear; S46: Front. Sears – 50, 51 FN action. S45: Rear; S46: Front. Sears – 51L. S55: Rear; S46: Front. Sears – 53. S47: Rear; S46: Front. Smith & Wesson – Mauser Action. S55: Rear; S46: Front. Stevens – 110E. S61: Rear; S46: Front. Weatherby – Mark V 22-50, 224, 30-06. S36: Rear; S46 : Front. Winchester – 70 Long & Short action, H&H mags above #1,896,476. S47: Rear; S46: Front. Winchester – 70 Long & Short Action, H&H mags above #1,896,476, F/extension. S46: Front. Winchester – 70 Target, H&H mags above #1,896,476. S49A: Rear; S46: Front. Winchester – E2 Hole spacing same. S46: Front & Rear/ Winchester – 670, 770. S47: Rear; S46: Front.

S466 Base fits Marlin - 9, 36, 46, 62, 93, 336, 375, 444, 1893, 1894, 1895, Camp Carbine, 922M, 989, Glenfield 30. S466: Front & Rear.

S47 Base fits Browning – A-Bolt after 1996. S47: Rear. Browning – A-Bolt, A-bolt 22 before 1996. S47: Front & Rear. Browning – BBR long & short action. S47: Rear; S46: Front. Cooey – 71. S47: Rear; S46: Front. Enfield – Receiver cut down like: Winchester 70. S47: Rear; S46: Front. Marlin – MR-7. S47: Rear; S46: Front. Ruger – 44 mag Deer Stalker, 96/44. S47: Rear. Sears – 53. S47: Rear; S46: Front. Winchester – 70 Long & Short action, H&H mags above #1,896,476. S47: Rear; S46: Front. Winchester – 670, 770. S47: Rear; S46: Front. S49A Base fits Winchester – 70 LA, Magnum rifles.

S54 Base fits Browning – BAR, BAR II, Mark II, semi-auto. S54: Front & Rear. Colt – Coltsman LA round receiver. S54: Front & Rear. H&R – 300, 301, 330, 370 before 1973. S45: Rear; S46: Front. H&R – 300, 301 long action after 1973. S45: Rear; S46: Front. Musgrave – Mark I, Mark II. S54: Rear; S46: Front. Musgrave – Mark III, Mark IV. S54: Rear; S46: front. Springfield – ’03. S54: Rear; S55: Front.

S55 Base fits High Standard – Hi-Power. S55: Rear; S46: Front. Mauser – HVA, Swedish 96 small ring. S55: Rear; S46: Front. . Mauser – 95, 96 F/extension. S55: Rear; S402: Front. Mauser – Mark X. S55: Rear. Mossberg – 680, 695, 800. S55: Front & Rear. Sears – 51L. S55: Rear; S46: Front. Smith & Wesson – Mauser Action. S55: Rear; S46: Front. Springfield – ’03. S54: Rear; S55: Front. Westernfield – 770, 775, 780. S55: Front & Rear.

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Reviews Summary

Customers generally appreciate the GRAND SLAM BASES for their solid construction and perfect fit, particularly for Weatherby and Savage 10 models. Reviewers note the mounts provide improved scope clearance and are easy to install. However, some caution that they are sold individually and may extend into the feed port of some rifles, which might affect loading.

What Reviewers Are Saying

Product Quality

80%

Reviewers frequently highlight the well-made construction and sturdy design of the bases, emphasizing their superiority over standard aluminum mounts, particularly for specific models like Weatherby and Savage 10.

Fit and Compatibility

75%

Many reviews mention that the bases fit perfectly for various rifle models, enhancing the experience by allowing for proper scope positioning and assisting with sight alignment.

Ease of Installation

70%

Customers find the mounts easy to install, which contributes to a positive user experience. The straightforward installation process is frequently noted, making setup quick and hassle-free.

Value for Money

50%

Several users appreciate the affordability of these mounts compared to other options in the market, particularly considering their functionality and fit.

Cautions regarding use

40%

Some reviews mention potential issues with the mounts extending into the feed port of certain rifle models. This serves as a warning to buyers to verify compatibility before purchasing.

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Solid

The bases are well made, fits my Weatherby perfectly.

Solid

The mount is solid, fits well on my Weatherby.

Strong!!!

A scope is only as accurate as its mounts, and these are far superior to the thin aluminum mounts that come standard on a Savage 10. I actually ordered these because I needed a few tenths more scope clearance and these taller mounts were way cheaper than buying taller rings. TAKE NOTE that these are sold singly, so you need to purchase in pairs; consider buying one as an extended mount to help with your ideal eye relief.

Excellent Base

A scope is only as accurate as its mounts, and these are far superior to the thin aluminum mounts that come standard on a Savage 10. Be warned that these extended bases will actually extend into the feed port of a Savage 10, but not so much that it gets in the way of loading-- I needed it for proper scope eye relief and am happy with the trade off. TAKE NOTE that these are sold singly, so you need to purchase in pairs.

Excellant

Perfect fit to bring scope back for easy and quick sight. easy ti install and storng

excellant

Strong, easy to install, perfect fit.