Overview
The Scalarworks LEAP series is T.Rex Arms’ preferred line of optic mounts. The appeal is straightforward: 7075-T6 aluminum with 4140H steel hardware, Type III anodizing and flash nitride finish, and Scalarworks’ patented ClickDrive quick-detach system that returns to zero reliably after removal. There are no protruding levers or thumbnuts to snag on gear or rap knuckles, and the mounts are notably lighter than most QD competitors in the same class.
The line spans purpose-built mounts for specific optic footprints rather than a single universal product. The three covered here are the LEAP/01 for the Aimpoint Micro footprint, the LEAP/10 for the Aimpoint Duty RDS / CompM5s, and the LEAP scope mounts in 30mm and 34mm tube diameters. A bolt-on FUSE scope mount also exists for shooters who want a non-QD platform.
ClickDrive QD System
The defining feature across the LEAP family is the ClickDrive wheel. Instead of a throw lever or a screw-and-nut clamp, the user spins a fluted crown by hand to clamp the mount onto a Picatinny rail. A spring-loaded ball detent locks the wheel against rotation, making the connection recoil-proof. The mechanism opens fully in under three seconds and includes a stopper indicator on the LEAP/10 to show when it has cleared the rail.
Tightening is hand torque only. There is no need for a wrench or a torque spec on the rail clamp itself — once the wheel won’t turn any further by hand, the mount is on. Return-to-zero is guaranteed by Scalarworks as long as the same person installs and reinstalls the mount, since hand-tightening pressure varies slightly between users.
The recessed clamp design has a practical benefit beyond aesthetics: nothing protrudes from the side of the receiver to catch on slings, plate carriers, or door frames, and there are no levers to bump out of position.
LEAP/01 — Aimpoint Micro Footprint
The LEAP/01 is built around the Aimpoint Micro footprint (two screws front, two screws rear, mounted from underneath into the optic body). That footprint is shared by a wide list of compatible optics:
- Aimpoint Micro T-2, H-2, T-1, H-1, and CompM5
- Holosun HE403, HE503, HE515, HE530, HS403, HS503, HS515
- Primary Arms Advanced Micro Dot and Microdot
- Sig Sauer ROMEO4 (H/S/T) and ROMEO5
- Vortex Crossfire, SPARC II, and SPARC Solar
Available heights and weights:
| Mount Height | Weight |
|---|---|
| 1.42” | 1.52 oz |
| 1.57” | 1.58 oz |
| 1.93” | 1.80 oz |
The 1.42” is an absolute co-witness — backup irons or a fixed front sight post will sit centered in the optic window. The 1.57” is a lower-third co-witness, putting the irons in the bottom of the window and allowing a more upright head position. The 1.93” is taller still, lifting the optic above the iron sight plane entirely. T.Rex’s stated preference is the 1.93” for general use: it allows a more upright shooting posture, plays better with night vision and gas masks, and still leaves enough cheek contact on the stock. The 1.42” absolute co-witness is more useful on taller-receiver platforms like HK 416s, SCARs, bullpups, and certain sub-guns.
The mount ships with four M3x4mm Nylok-treated screws and a T10 Torx bit. Optic screws are torqued to 10 in-lbs per the Scalarworks manual. Two access holes through the rear of the mount let the Torx bit reach the rear screws once the optic is in place.
LEAP/10 — Aimpoint Duty RDS / CompM5s
The LEAP/10 is a dedicated mount for the Aimpoint Duty RDS and CompM5s. It is lighter than the LEAP/01 despite mounting a larger optic — 1.34 oz at 1.57” height and 1.51 oz at 1.93” — because it’s CNC-machined from a single piece of 7075-T6 billet specifically for that footprint.
Key feature beyond the standard ClickDrive system: a forward lean built into the mount body to provide additional space behind the optic for a magnifier. The recessed-head hardware and stopper indicator on the QD wheel are both shared with the rest of the updated LEAP line.
Same two height options as the small-footprint mount:
| Mount Height | Weight |
|---|---|
| 1.57” | 1.34 oz |
| 1.93” | 1.51 oz |
LEAP Scope Mounts — 30mm and 34mm
The LEAP scope mounts apply the same ClickDrive QD system to a one-piece scope ring assembly. They are offered in 30mm and 34mm tube diameters and at standard heights including 1.93”. Recent revisions trimmed weight slightly (a 1.93” 30mm dropped from roughly 5.9 oz to 5.7 oz) and added a recessed pocket on the underside that accepts Scalarworks KICK offset red dot mounts. KICK mounts bolt directly to the scope mount with two screws, putting an offset RMR (or similar) on the same QD platform as the magnified optic — pop both QD wheels and the entire scope-and-offset package comes off as a unit, retaining zero on both.
A useful design touch: the scope ring tops do not separate from the bottoms when the four ring screws are removed. The ring opens on a hinge so there is no top half to misplace during installation. Ring screws torque to 20 in-lbs per the manufacturer.
The scope mount also includes an internal leveling screw — a small red screw inside the front ring that drives up against the flat underside of the scope’s turret housing. With the rings only loosely tightened, the user wiggles the scope while tightening the leveling screw; this mechanically squares the scope to the mount without needing external bubble levels or leveling jigs. Once the scope is leveled, the rings are torqued to 20 in-lbs and the leveling screw is backed off. On taller mounts like the 1.93”, there is enough open space that the leveling screw can theoretically vibrate loose under recoil, so it can either be removed and stored or held in place with a small piece of tape.
FUSE — The Bolt-On Alternative
For shooters who don’t need QD or who are running heavier optics or harder-recoiling rifles, Scalarworks offers the FUSE bolt-on scope mount in 30mm (FUSE/02) and 34mm (FUSE/03). The FUSE trades the ClickDrive wheel for a more traditional clamp-bolt design, and uses a separate LevelDrive tool (included) to mechanically level the optic. Weight is around 5.26–5.32 oz at 1.57” height. Like the LEAP scope mounts, the FUSE accepts Scalarworks KICK offset mounts to consolidate a primary scope and offset dot on a single platform.
Practical Notes
All Scalarworks products are made in the USA and cannot be shipped outside the US. Warranty service is handled directly by Scalarworks.
A note on zero with taller mounts: raising the optic above the bore line shifts the trajectory geometry. A 50/200 yard zero on a 1.42” mount is not the same trajectory as the same procedure done on a 1.93” or a riser-stacked mount — the second crossing point will move. Confirming actual point-of-impact at distance, rather than relying on published 50-yard zero targets, is the only reliable way to know what the holds actually are at 200 yards and beyond.