If you’re not a bullseye shooter, you probably haven’t heard of BME. BME made these crazy overbuilt dovetail-mount adapters for guns with LPA and Bomar cuts, as well as the target model Smith & Wesson autos like the 52 and 952. The owner of BME passed away a couple years ago.
Turns out, a machine shop in Maine bought the rights to BME’s designs this year and is selling the new mounts through a store called One Force Weaponry. I was happy to see this, because my goal was to step out of Metallic Sights and start competing in Open—but I really did not want to drill and tap a .45 for a rib or buy another gun. I bought an “Ultradot Mount” for my LPA-cut Range Officer. The machinist advised it was a modified Weaver-type mount that would work well with common microdots.
It’s an overbuilt chunk of aluminum rail with four leveling/adjustment screws (that double as set screws) and a dovetail set screw. Installation was a piece of cake; the front “flat” of the cut (under the leading edge screws) was slightly oversized, so I was able to get a snug press fit with stones, a small padded vise, and marking fluid pretty quickly.
The rail is Weaver/Picatinny dimensions, but the slot is undersized to function better with common microdot mounts. A standard Weaver slot is .180” and a Picatinny slot is .206.” The crossbolts found in most microdot low mounts (Aimpoint, Holosun, Primary Arms) and Weaver-type scope rings are .149-.150.” The slot cut in the new BME sight mount is a couple thou larger than .150.” Hopefully, this minimizes the risk of crossbolts having enough runway to get battered under recoil, which causes optics to come loose (and crossbolts to break).
The leading edge of the mount (fore and aft of the slot) looks as small and light as possible: large enough that the gripping parts of a microdot mount have full contact, but nothing extra.
I am mounting a Holosun HS403R to this base next week and zeroing with my softball loads. Joe Chambers (and several folks on bullseye forums) have run the Holosun tube sights on bullseye 1911s and found them to hold up well. Hopefully, the light weight of the mount and sight won’t require respringing the gun entirely.
Turns out, a machine shop in Maine bought the rights to BME’s designs this year and is selling the new mounts through a store called One Force Weaponry. I was happy to see this, because my goal was to step out of Metallic Sights and start competing in Open—but I really did not want to drill and tap a .45 for a rib or buy another gun. I bought an “Ultradot Mount” for my LPA-cut Range Officer. The machinist advised it was a modified Weaver-type mount that would work well with common microdots.
It’s an overbuilt chunk of aluminum rail with four leveling/adjustment screws (that double as set screws) and a dovetail set screw. Installation was a piece of cake; the front “flat” of the cut (under the leading edge screws) was slightly oversized, so I was able to get a snug press fit with stones, a small padded vise, and marking fluid pretty quickly.
The rail is Weaver/Picatinny dimensions, but the slot is undersized to function better with common microdot mounts. A standard Weaver slot is .180” and a Picatinny slot is .206.” The crossbolts found in most microdot low mounts (Aimpoint, Holosun, Primary Arms) and Weaver-type scope rings are .149-.150.” The slot cut in the new BME sight mount is a couple thou larger than .150.” Hopefully, this minimizes the risk of crossbolts having enough runway to get battered under recoil, which causes optics to come loose (and crossbolts to break).
The leading edge of the mount (fore and aft of the slot) looks as small and light as possible: large enough that the gripping parts of a microdot mount have full contact, but nothing extra.
I am mounting a Holosun HS403R to this base next week and zeroing with my softball loads. Joe Chambers (and several folks on bullseye forums) have run the Holosun tube sights on bullseye 1911s and found them to hold up well. Hopefully, the light weight of the mount and sight won’t require respringing the gun entirely.
