Leapers UTG Super Slim Picatinny RMR Mount Lower 1/3 Height Black - MT-RMR13C

Leapers UTG Super Slim Picatinny RMR Mount Lower 13 Co Witness MT RMR13C UPC 4717385554626

Product Description

The Leapers UTG® Super Slim Picatinny RMR Mount (SKU: MT-RMR13C / UPC: 4717385554626) is an ultra-lightweight, high-strength mounting solution engineered to elevate micro red dot sights featuring the Trijicon® RMR® footprint to a lower 1/3 co-witness height on flat-top AR-15 and tactical rifle platforms. Built to withstand punishing centerfire recoil and hard field use, this optic riser positions your red dot above standard A2 front sight posts and folding iron sights, decluttering the optical window while retaining emergency backup sight deployment.

Precision CNC-machined from aircraft-grade 6061-T6 aluminum, the Super Slim profile incorporates significant material-relieving lightening cuts that reduce parasitic system weight down to an agile 1.55 ounces without sacrificing rigid structural integrity. Finished in a MIL-spec-compliant, non-glare matte black hardcoat anodization, the mount resists aggressive chemical solvents, bore cleaners, saltwater corrosion, and harsh field abrasion encountered in duty or competition environments.

The base features an integrated steel recoil lug with a heavy-duty Torx cross-bolt and locking plate designed to seat into standard MIL-STD-1913 Picatinny rails with zero mechanical play. The upper optic platform features dual precision-machined indexing recoil bosses that lock directly into the red dot base socket holes, preventing optic shear forces from transferring to the mounting screws during heavy semi-automatic cycling or sustained multi-shot strings.

*Armorer Bench Notes & Real-World Staging Guidance:*

Fitment Matrix: Direct fit for MIL-STD-1913 Picatinny rails. Compatible with Trijicon RMR, Trijicon SRO, Holosun 407C, 507C, 508T, and secondary optics sharing the identical screw spacing and boss indexing pattern. CRITICAL: NOT compatible with Weaver rail slots or slim micro footprints (RMRcc, Shield RMSc, Holosun 407K/507K). Ensure correct screw lengths are used for your specific optic housing depth to avoid bottoming out against the mount base. Torque the Picatinny cross-bolt to 30–35 in-lbs. Torque optic mounting screws to 12–15 in-lbs using low-to-medium strength threadlocker (Vibra-Tite VC-3 or blue Loctite 242).

1. Ensure the host firearm is completely clear, magazine removed, and chamber visually and physically verified empty.
2. Degrease the receiver rail surface, mount clamping plate, Torx cross-bolt, and optic mounting screw threads with isopropyl alcohol or quick-dry degreaser.
3. Place the UTG mount onto the desired Picatinny rail slot, push the mount firmly forward toward the muzzle to seat the cross-bolt against the rail recoil shoulder, and torque the Torx cross-bolt to 30–35 in-lbs.
4. Place your RMR-pattern optic onto the mount, ensuring the indexing bosses seat completely into the optic base sockets with no light gap visible underneath.
5. Apply a single drop of blue threadlocker to each #6-32 optic screw, hand-start the threads, evenly tighten, and finalize torque to 12–15 in-lbs before conducting zero verification.

Key Features

• Precision 6061-T6 Aluminum Construction: CNC-machined from billet aluminum to provide exceptional strength, tight dimensional repeatability, and zero tolerance variance.
• Super Slim Lightening Cuts: Aggressive weight-relieving architecture keeps total weight to just 1.55 oz, avoiding top-heavy imbalance on tactical carbines.
• True Lower 1/3 Co-Witness Height: 0.96-inch saddle height positions the optic dot above backup iron sights for a clean, unobstructed primary sight picture.
• Integrated Recoil Bosses & Steel Lug: Heavy-duty steel cross-bolt and precision-milled optic locating lugs absorb violent recoil impulses to preserve consistent zero.
• Durable Hardcoat Anodize: Matte black finish provides non-reflective camouflage and protects underlying aluminum against oxidation, solvents, and scratching.
• Hardware Included: Ships complete with locking plate, Torx rail cross-bolt, optic mounting fasteners, and installation Torx wrenches for immediate armorer staging.

Product Specifications

• Brand: Leapers UTG®
• Model/Series: Super Slim Picatinny RMR Mount - Lower 1/3 Height
• MPN / SKU: MT-RMR13C / MTRMR13C
• UPC: 4717385554626
• Platform Compatibility: MIL-STD-1913 Picatinny Rail
• Optic Footprint: Trijicon RMR / SRO (and compatible variants)
• Saddle Height: 0.96 in. (24.4 mm)
• Material: 6061-T6 Aircraft Aluminum Billet with Steel Hardware
• Finish: Matte Black Hardcoat Anodized
• Overall Length: 1.78 in. (45.2 mm)
• Country of Origin: Taiwan / Designed in the USA