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Weaver Base Top Mount

4.7 out of 5 stars 141 customer reviews
| 16 answered questions

List Price: $5.49
Price: $4.00 & FREE Shipping on orders over $49. Details
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  • Professional mount
  • Weaver products
  • Weaver bases
  • Top mount aluminum base
  • Machined to tight tolerances for a custom fit
  • For detachable and adjustable rings
  • Aluminum bases offer maximum strength for rings to hold tight
Add-on Item
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The Add-on program allows Amazon to offer thousands of low-priced items that would be cost-prohibitive to ship on their own. These items ship with qualifying orders over $25. Details
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$4.00 Add-on Item & FREE Shipping on orders over $49. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • Weaver Base Top Mount
  • +
  • UTG 1"/2PCs High Profile Picatinny/Weaver Rings
Total price: $19.22
Buy the selected items together

Product Description

This item manufactured by Weaver is top of the line in top mount bases . The Weaver R/M/b/a top mount bases 48012 12 Rem514 Win74 will enhance your firearms in a way only Weaver can do. Pick up one for yourself today.

Product Details

  • Product Dimensions: 2.6 x 0.2 x 7 inches ; 1.6 ounces
  • Shipping Weight: 2.4 ounces (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B000N8MYO4
  • Item model number: 48012
  • Average Customer Review: 4.7 out of 5 stars  See all reviews (141 customer reviews)
  • Amazon Best Sellers Rank: #34,554 in Sports & Outdoors (See Top 100 in Sports & Outdoors)

Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By Roger J. Buffington TOP 500 REVIEWERVINE VOICE on March 1, 2014
Verified Purchase
This is a Weaver base mount for rifles that are drilled and tapped for such a base mount, such as the Ruger American Rimfire rifle, for example. It attaches to the rifle and in turn allows the attachment of a Weaver style scope ring. I used one of these to attach a red dot sight to my Ruger American Rimfire .22WMR rifle.

The picture on the Amazon product page is confusing. In fact, you only get one of these, so if you are attaching a conventional scope that requires two rings you will need to order two of these. My CompC3 Aimpoint sight mounts with a single ring, so I only needed (and only got) one base mount when I ordered from Amazon.

The construction, fit, and finish of this product is excellent. Attach it with a bit of blue Threadlocker and you will be good to go. It looks like an OEM part of the rifle. RJB.
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Easy to install, came with everything needed to install on my XT-22. Made in the USA which is always a plus. As a reminder you need to buy two.
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These worked fine on my Marlin XT-22. Very easy to install, they don't get in the way of the ejection port, and they come with the longer screws needed. Not much more to say. They do what you expect them to do.
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Attached to the top of my Ruger American Standard bolt-action 22LR rifle. Worked perfectly with
AccuShot Picatinny/Weaver Medium Profile mounts for attaching a Nikon ProStaff Rimfire 3-9 x 40 scope.
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Just got them and already love them! You need a tapped barrel in order to use them, but make sure that you buy 2. I have them mounted on a Marlin XTR22R. Main reason that I got them is that my wife would rather shoot open sights for varmint. I have a BSA 22 Sweet that I like to be able to take to the range for some more long-range target shooting. Pic shows you open, scoped and line of sight with the open sights. Easy to install, quick on and off with my mounting rings: UTG Max Strength LE Grade Quick Detach Picatinny Scope Rings (2 Piece, 1-Inch Diam, 4-Screw Med Profile) - also from Amazon; can't wait to get dialed in with the new set-up. In the meantime, critters beware.
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The fit and finish of these Weaver #12 mounts was perfect. They matched perfectly with the crown of the receiver on my Ruger American Rimfire .22LR rifle. The same top mount works for both the front and rear mount on that firearm. Highly recommended product over the Ruger 3/8" groove mount system that's already machined into the receiver. There's just not enough flexibility there with how far forward or rearward one can mount a scope, but the the Weaver-style mounts offer the opportunity to use offset scope rings for extended or reduced eye relief as needed.
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Fits perfectky on my Marlin XT22! Helped to expand my rifle scope mount from 3/4" to the necessary 1" which fit my scope rings. Also, This is a (Weaver #12) - although the seller on Amazon does not include this IMPORTANT information in their description. Something to keep in mind - Make sure you order 2 of these as only 1 is included.
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These fit perfectly for my needs!! They fit right on and are rock-solid. In case you have my rifle, they absolutely fit!
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