BKL 1-Pc Mount, 4" Long, 1" Rings, 3/8" or 11mm Dovetail, For Bolt-Action Guns, Matte Black

Great product for my CZ455 Evolution in .22LR application.

I would prefer to see Torx screw instead of Allen keys....I don't even have allen key bits for my torque wrench....providing torque specs would be nice...

Pyramid's service was excellent,. shipping was prompt, price was right. Thank you.

Machine work and finishing detail are excellent.

Dimensionally these rings fit the receiver dovetail very well, but the ring portion is not circular, it is football shaped. This causes contact at only the top an bottom of the scope tube which deforms the scope tube as the rings are tightened. They are made this way on purpose according to FAQ #15 on the BKL website, but their theory on how the football shaped rings will "become a circle around the scope tube" as you tighten them is highly flawed. The tube wall on even the best scope will distort before the out-of-round ring "becomes a circle". I tried two different Leupold scopes and both were tightened with a #-in. torque screwdriver incrementally and the rings deformed both scopes. BKL needs to get a new engineer. Don't buy these rings.

If you already have these rings installed on rifle, use a set of calipers or a micrometer to measure your scope tube right next to a ring, you will likely find it is crushed and out-of-round by at least .005"

easy to install, very tight grip onto the mount and scope.

nothing, its perfect for my cz452

Nicely crafted product that attaches to a CZ 452 American dovetail securely.

These rings seem to be designed primarily for a bolt action rifle which is the application that I purchased it for. However in my case, mounting a Nikon 3-9 x 40 ProStaff scope, there is not quite enough clearance for the bottom of the scope's adjusting turret to clear the rail connecting the forward and aft rings. I am having to use a shim to raise the scope slightly to gain clearance. Another 0.05" clearance between the bottom of the rings and the connecting rail would have helped my installation.

This particular Nikon scope seems to have a larger bulge at the bottom of the turret than other scopes I've seen so it shouldn't be a problem for all scopes. For airgunners I don't see the need for the cut out between the front and rear rings unless you have a bolt action, otherwise you'd probably be better off with the solid mount ( BLK#260 x 4").

Solid mount. I bought this mount for use on my Benjamin Discovery, and it works well for that application. There is ample room for your fingers to place pellets in the breech, and it's convenient to have a one piece mount rather than dealing with separate rings. I was impressed with the thoughtfulness that went into engineering this product. There are threaded holes in the side that allow you to use the rail mount screws to spread the jaws of the mount to help it fit wider rails. Also, the package included a hex wrench for the screws.

I would have made the rings sit a little bit higher. The scope I used has pretty typical dimensions, but there was very little (but enough) clearance between the scope turret "saddle" and the base. About one millimeter of clearance or less. Still, there was enough room, and the mount is great.

I bought a scope mounting tool kit, and it has proved valuable for mounting scopes (and other purposes). It includes a set of scope ring alignment rods, a scope ring lapping bar and lapping compound, two bubble level vials to make sure the scope is level with the receiver or breech block, some thread locking compound and a torque driver to allow you to precisely torque the rings and mounts to get them as tight as possible without damaging your delicate and expensive optics. The torque driver is also useful for re-attaching your stock to the tame torque each time, to ensure repeatable accuracy. I highly recommend getting one of these kits if you're going to be mounting more than one or two scopes. It has allowed me to get professional results without the wait and expense of hiring a gunsmith.

As for the mount, you can't go wrong. It does not have a stop pin for heavy recoiling spring guns, but for PCPs and multi pumps it's ideal. (And how many spring guns have a bolt action anyway?)