Lightweight Scalarworks Mount for RMR

    I have been a willing spectator (and participant at my day job) in the pursuit of reducing weight from firearms. Armed with billet, companies are using CNC machines and a bit of engineering to remove in many cases over 95% of the base billet into some truly unique products.

    Taking advantage of the computer and CNC combination is Scalarworks, who’s previous release for the already low-weight Aimpoint T2 was well-received. Uping the ante and dropping the weight is their new mount for the Trijicon RMR. The mount is a scant 1.27 ounces. Total weight with the optic is 2.5 ounces.


    While a few dedicated mounts may be slightly lighter, the new Scalarworks LDM/RMR is the lightest quick-detach option on the market. The Q/D is valuable for those wanting to use non-canted back-up iron sights. If the main optic broke, was fogged, or otherwise unusable, it would need to be removed.

    The LDM/RMR is manufactured from 7075-T6 aluminum and includes their “recoil-proof” notched thumscrew and ball detent system. Scalarworks claims a “repeatable zero” so long as the LDM is mounted in the same place.

    Pricing is set at $149 for the mount. Both absolute and lower one-third mounts are available. Put another way, the mount is little over $100 / ounce.



    MATERIALS: 7075-T6 Aluminum Alloy / 4140H Steel Alloy
    FINISHES: Mil-A-8625 Type III Hard Coat Anodizing / Black Nitride™
    WEIGHT: 34.3g (1.21oz) LDM400 / 35.6g (1.26oz) LDM410 + 1.8g (0.06oz) SCREWS
    WARRANTY: Lifetime

    HEIGHT OVER RAIL (OPTIC CENTER): 36mm (1.42″) LDM400 / 40mm (1.57″) LDM410
    COMPATIBLE FIREARMS: AR-15, AR-10, SCAR, Tavor and similar with MIL-STD-1913 Picatinny Rail

    Nathan S

    One of TFB’s resident Jarheads, Nathan now works within the firearms industry. A consecutive Marine rifle and pistol expert, he enjoys local 3-gun, NFA, gunsmithing, MSR’s, & high-speed gear. Nathan has traveled to over 30 countries working with US DoD & foreign MoDs.

    The above post is my opinion and does not reflect the views of any company or organization.