Crosman 459MTC 4-Piece 3/8-Inch Airgun Scope Dovetail Mount Rings

The perfect item for mounting a scope or red dot to your air pistol or gun. It mounts to the barrel of your gun and provides and 11 mm taper surface for your item. I put a picatinney adapter on the clamps and attached a red dot to it. Leveled it out and zero in the gun, works well. It is rock steady.

Perfect and secure fit if using top rail picatinny mounts for optics on your Crosman barrels and airguns.

As several other reviewers have mentioned, the mounts and the added weight of the scope cause the barrel to move. This is not a great design. It is easily fixable, but I'm a firm believer that you shouldn't have to "fix" something that was specifically designed for this purpose. That's called bad design. It is probably because they designed these to work on multiple pellet guns, so they had to loosen tolerances. I understand that, but it seems like they should have built in "adjustments" to make the design work as intended. I installed these on a 1322 and mounted a rather heavy scope with integrated laser and LED reticle. Everything worked well, but there was clearly "slop" between the barrel and the rest of the pistol caused by the scope/mounts. I read several reviews somewhere, as well as here on Amazon, about putting tape or other "spacers" under the mounts to "stop the slop". This works. Again, bad design/implementation by Crosman, but at least there is an easy solution. For my particular situation, I first used small pieces of rubber eraser. That didn't work. They rubber flexed to much and slid out of place. Then, when I made the rubber shims thicker, the mounts chopped them in half. Rubber eraser was a fail. I then cut off small slices (3/16"x1/2") of a point-and-shoot camera strap. It was the typical nylon webbing strap most old 35 mm camera's had to dangle the camera around your neck. There were several other webbing straps on all kinds of devices that I thought about using, but since I never use my old camera (Canon 35mm waterproof) any more, it's strap got cannibalized. That said, after I cut off 4 shims from each side of the strap, I just melted off the end of the strap with a lighter and can't really notice that it was shortened. There was plenty of extra, unused strap length. Cutting off less than an inch of it didn't really make a different. I took the "shims", but places them under the feet of each mount. Tightened them down (carefully, since other users have made me paranoid about the screw threads stripping). The webbing shims worked perfectly. Closed the space under the mount. No more wobbly scope. It's been rock solid for months now. Stays zeroed on the scope and laser.

These worked perfectly for my Crosman P1322. They clamp to barrel and fit snugly. These are about the only way to add a laser or light to a P1322.

These intermounts are made to fit 7/16" (0.4375") O.D. (Outside Diameter) pellet gun barrels. You can use one set of 2 mounts, or two sets (with 4 rings), depending on how much holding power you need. If you have never mounted a scope before, ask someone to help you, or at least look for articles and videos before going at it, as it's easy to make a mistake that might damage the mount, optic, or gun. These are made from solid Aluminum, not 3D printed plastic, and are strong and stable. Some pellet guns have 9/16" (0.5625") barrels or receiver - These guns will work better with the Air Venturi AV-BJ0014 intermount. Buy a caliper. Learn to measure... Or cry because you didn't.

3 stars is the average rating for this item, and it's fairly accurate. However I believe it's an optimistic rating. I don't know what product those who rated this 5 stars received, but it must be different than what the rest of us got. I mounted these on a new Crosman 1377 (Yes, one of the guns listed) and it does fit. However, it's not secure. Even after shimming both sides of the mount, it's still not sure and has slight play in ALL directions for the scope (up down, left and right). This is because the bottoms of the mount do not tighten onto anything. The sides tighten around the barrel just fine, but even after tightening the screw as far as it will go, the bottoms of the mount do not contact the air gun whatsoever. Perhaps there is model in the list where the bottoms DO contact the air gun, in which case the mount would be more stable. But, this is not the case for the Crosman 1377. A few gripes about the design.. as stated, the screws will strip VERY easily, even if you are careful. Not sure of any way around this, other than not over tightening the mount.. although you will be tempted to try, given the poor fit. They are two separate pieces of metal for each unit of the mount (obviously) and in my case, they were not properly lined up. It seems the drill had gone in slightly askew, so I had to hold the two pieces together very close while tightening the mount, so that they would not go on crooked. On a positive note though, they will do as advertised and hold a scope or dot sight. But not securely. It seems very fragile, and I will be taking great care when traveling with the air gun not to break the mount. The shipping was fast, and free. So I can't complain there.

These mounts are specifically manufactured, and advertized to fit the Crosman 13XX series variable power pellet pistols (1300, 1322 & 1377) AND some other specific Crosman pistols and rifles (2240, 2260...). If you don't have one of these, then don't buy them and give them a bad review (or do your THOROUGH research first- but don't complain if they don't work for YOUR application). These are of good design to fit the aforementioned guns and are manufactured with close tolerances making a secure attachment 100% possible. There is no way these will "normally" become loose, or not fit on the barrel- even without shims or tape- unless you bang your attached sight (red-dot, scope, etc.) around or have stripped the screws. What some of you might experience is the slight movement of the barrel in the receiver which imitates a loose mount. And in RARE conditions you did find the need to shim in order to tighten the mount's grip, I'd place some plastic or metal at the TOP of the 3/8 (dovetail) "rail" in order to keep that area of the Intermount 459MT from closing in while you tighten the screws. This may, however, widen the "rail" some making your attachment of the sight a little more difficult. Make sure the barrel and mounts are oil and grease free before attaching! Also, if you over-tighten your scope, red-dot, etc. on the mount, you will, of course, loosen the grip of the mount on the barrel (DUH). If this occurs, remove the sight, carefully re-tighten the mount then re-attach your sight firmly but not too tightly. Although I don't have all the pistols this mount will fit, I do have both the Crosman 1300 Medalist II and the 1377 which the mounts fit perfectly and have a set each on both guns. Could they be designed better... possibly. Are they Mil-Spec... no. Could they be made of higher grade metal... of course... but then they would probably cost more than the gun they were designed for. So... I hope this clears it up for both those who claim they won't fit and those of you whom are indecisive on whether to purchase or not. Amazon has a good return policy and will provide a return shipping label if you do have (legitimate) issues... provided you aren't yelling at them when you contact customer support! Food for thought about any complicated process (like this): If you're an adult having a problem attaching these mounts, give it to a kid to handle... If you're a kid- give it to an adult to fix.

Total junk, zero stability, does NOT stay stable whatsoever, cannot use for a mount base for any aftermarket sight, don't waste your money on this mount. You are stuck with the junk stock sights.