The technique is not mine.
When I first mentioned it here, maybe over ten years ago, I was informed that it had been seen at the US Army MTU.
I just want to see more folks have this other option.
The Leupold above looks like a serious bargain.
Once again, being the resident cheapskate, I put
these Nikon mounts on my two AR Stoner 6.5 Grendel Uppers. They also make one in 30mm, but I could not find any for 34mm.
I had reasons beyond the very low cost:
I had been using Nikon P-Series 1 inch individual mounts, which allowed adding a mounting lug on the rail for my Caldwell brass catchers in between the two mounts. But the P-series mounts slide onto the rail, and for some reason the AR Stoner rail was oversized (o/o spec?) and the mounts would not go on. The Monstrum mount uses a different fastening method, and does not have issue with the AR Stoner rail. So, rather than butchering the Nikon mounts, I could save them for other builds.
The Monstrum mount's cantilever design allows the mount to remain completely over the receiver and not extend onto the handguard rail. I mount my scopes with the eyepiece bell directly even above the rear end of the receiver. Even in this position, the cantilever allows the Caldwell lug to be mounted on the handguard rail with enough rearward positioning that the brass catcher will still work OK. That was a gamble, but I got lucky with that one.
This catcher can save brass when it is required that one leaves one's brass where it lies.
Greg