Leupold Standard Two-Piece Scope Base

I favor the Leupold/Redfield style of mount because they allow solid ring mounting without a lot of fuss. The mechanical dovetail front is easy to install (no scope tool? Use a dowel or a piece of 1-inch PVC pipe). The screws provided are high quality Torx head screws, and they have a bit of blue loctite already on the threads; I found this a nice touch and highly convenient. The rear mount has a modest amount of windage built into the ring mounting screws.I purchased my set for a new Browning X-Bolt. The Leupold set fit the provided mounting holes perfectly and installed without any surprises. I also like the fact that Leupold provides the proper Torx wrench in the package, so you don’t have to hunt for your toolbox or Allen key set for installation.For endorsement, no rifle I own with the Leupold/Redfield Austen has ever had any problems with accuracy or shifting zero. While I have other bases such as Weaver, Millett, Remington, and Tikka, I much prefer the Leupold system, even though I am not a Leupold scope snob.

I wasn't quite sure how well these would work. I was skeptical about the twist in front and screw tightening on the back. It takes a little force to twist the front ring into place. But I'm glad I bought these, they do work well.

These are standard leupold two piece mounts. Quality product. As described. Good value

The rear base in the picture should be turned around. If you mount it that way; the bolt won't open. I bought this to replace a one piece base that I had on a Remington 700 in .30-06. With those mounts, the rear ring sets farther forward. I also bought an extended ring for the front. Long actions seem to put the scope too far forward in my opinion. The Objective end of my scope's outside diameter is 115/16 inch in diameter. I bought High Rings. The bottom of the scope in the front clears the rear of the rear ramp sight enough that the ramp doesn't show up as a blur when looking through the scope.I recommend putting gun oil on the front mount and then using an open end wrench to loosen up the ring in the base. A few turns back and forth makes a big difference.This design allows you to get the scope lined up with the barrel as needed. I have a Winchester Model 70 that I installed the Dual Dovetail Bases on. I couldn't get the windage in the scope to line up right. I used a Bore Sighter. Somebody at the factory messed up.

I bought windage adjustable bases to adjust for some seriously misaligned scope mounting holes on the receiver of an older Model 70. I paired the bases with Burris Signature rings so I could use the inserts instead of messing about lapping rings. Worked great for that and I was able to adjust ~24" of windage and get zeroed with minimal scope clicks.However, I have a few other probably 15-25 year old sets of Leupold mounts for other rifles and those clearly have better worksmanship/finishing. These newer ones have a noticeably rougher finish and sharper edges. I have no reason to believe the new ones won't hold up - just disappointed in another shortcut to save an extra buck.

Put these #51701 bases on a Weatherby Vanguard S2 and they are a perfect fit. Optically centered my scope using the mirror method and after adjusting the windage with the rear base, have it bore sighted at 40 yards without touching the adjustment turrets on the scope. Haven’t shot it yet but it should only take a minor adjustment to get it zeroed. And these are absolutely 0 moa. Vertical lined up dead zero also. Good clean, uncluttered look.

Good rings

Perfect fit on Rem 700, includes instructions and tools needed for install. Only problem I had was the instructions had torque specifications for 2 different sized screws with no indication which size were included. Called the number on the packaging for customer support, answered on ring two by a human being who quickly checked which screws were included with this (the smaller size, can't recall exactly right now). Comes with thread locker on the screws already, you MUST use a torque wrench with inch-pounds in order to ensure you get them on without stripping the threads. Also check inside the receiver to ensure you don't have screw heads poking into the chamber.I used Leupold medium rings for a Nikon Monarch 3, reviewed separately. Recently zeroed the combination and it holds tightly with 180 grain .30-06 core-lokts.

as expected for the name - great quality

What can I say LEUPOLD!FYI: these fit Savage 93R17 too, that's where mine are

nice

nice