LM / Galil Dustcover mount for RMR
I am in the process of developing a LM/Galil dustcover mount for the Trijicon RMR.
The production model will be a little different form the proto (pictures to follow once I find out how to upload/attach) because I initially intended for the mount to be "reversable" and usable for 2 types of mini dots, namely the RMR and the Burris Fastfire/Docter type. They have different mounting templates.
I have since decided to keep the mount as simple and "clean" as possible and to rather make a dedicated mount for each of the mini dots starting with the RMR because imo this is the first prize in mini dot sights currently available.
What I found really interesting was that even though the sight was removed from the mount and the mount removed from the dustcover to have the proto anodized, I had no loss of zero after the all the parts were fitted to the dustcover again.
I have now fired around 300 rounds of ammo with no shift in zero even after the sight and mount has been disassembled and reassembled.
I fitted a new dustcover to my LM for a nice and secure fit and I think that will be the important factor in ensuring a durable zero. The mount itself does not allow any sideways movement on the dustcover and by drilling the dustcover to the exact size of the mounting screws the mount will not allow front/rear movement.
I have pictures of the pre-anodized mount on the dustcover but I do not know how to upload.
The mount will be the footprint size of the mini dot and is small enough to fit on the flat plane in front of the rear iron sight and it will be elevated correctly to provide co-witness with the original sights of the LM.
The base/sole of the sight will sit 10mm above the dustcover - that will give lower third co-witness for the iron sights (if the RMR is mounted in front of the rear iron sight) and place the dot just a tad above the front post to not interfere with sight picture when the irons are used. These values will be for the RMR with a 25m - 30m zero which gives about a 1.5" to 2" low POI at 10m.
Mounted on a clean dustcover (no rear irons sight) the aperture of the RMR gives a very CQB usable giant ghost ring when used in conjunction with the "ring" of the front sight on the LM in the unlikely event that the RMR diode dies or the lense has become fubar.
There was one on Gunbroker yesterday for a mere $1000! Sorry I didn't save the link...