Description

The SIG Sauer MCX Spear-LT (PMCX762R11BLT) is a semi-automatic pistol-configuration 7.62x39mm firearm built on the proven MCX platform and chambered in a caliber that feeds reliably from a wide range of steel and brass-cased ammunition, making it a capable short-barrel 7.62×39 pistol for suppressor-ready tactical use, range work, and home defense applications.

Key Features

• Part number: PMCX762R11BLT
• Caliber: 7.62x39mm
• Capacity: 28+1 rounds
• Barrel length: 11.5 inches, carbon steel, nitride finish
• Barrel twist rate: 1 in 9.5 inches
• Barrel threads: 5/8-24
• Action: Semi-automatic, gas piston operated
• Frame material: Alloy
• Frame finish: Coyote anodized
• Grip: Coyote polymer
• Trigger: SIG Flat Blade Match trigger
• Sights: Optics ready, no sights included
• Stock/brace: Folding Pistol Contour Brace (PCB)
• Overall length: 21.3 inches (folded)
• Height: 7.5 inches
• Weight: 6.2 lbs
• Safety: Ambidextrous manual
• Gas system: Adjustable gas block
• Handguard: Lightweight with M-LOK attachment points
• Forward assist: Yes
• Muzzle device: Rocksett SIG QD suppressor-ready flash hider (5/8-24)
• Magazine included: One 28-round steel magazine
• Magazine compatibility: AR-15 pattern 7.62×39

Special Features

• The gas piston operating system keeps combustion gases and carbon fouling out of the receiver, producing a cleaner, cooler-running action that maintains reliability across extended fire strings and suppressed use.
• The 7.62x39mm chambering brings the MCX platform to a caliber long valued for its terminal performance and broad ammunition availability, and SIG engineered a new latch system specifically designed to handle the wide variety of 7.62 ammunition headspacing and dimensional tolerances reliably.
• The Rocksett-applied SIG QD suppressor-ready flash hider threads directly onto the 5/8-24 muzzle and accepts SIG’s quick-detach suppressor line without tools, making suppressor transitions fast at the range or in the field.
• The SIG Flat Blade Match trigger provides a straight-pull, flat-face geometry with a crisp break that improves trigger control consistency and is compatible with standard AR-15 pattern trigger group components for future upgrades.
• The folding Pistol Contour Brace collapses the overall length significantly for storage and transport while deploying quickly for supported fire, and the minimalist design keeps total weight low.
• The fully ambidextrous controls, including the bolt catch, bolt release, safety, and magazine release, allow left- or right-handed operation without any modification or part swaps.
• The interchangeable barrel system allows the shooter to reconfigure the platform into other MCX-compatible calibers and barrel lengths, extending the long-term value of the lower receiver investment.
• The lightened M-LOK handguard uses attachment screws for added rigidity while reducing overall weight, and provides full-length accessory mounting real estate for lights, lasers, and grips.

Practical Benefits

• The 11.5-inch barrel keeps your overall package tight for vehicle use, home defense, and range transport while still delivering the terminal energy of the 7.62×39 cartridge at realistic engagement distances.
• The adjustable gas block lets you tune the system to run cleanly whether you run brass, steel, light loads, or heavy subsonic ammunition through a suppressor.
• The coyote anodized finish gives the MCX Spear-LT a flat earth appearance that pairs naturally with common gear colors and holds up to field conditions without additional treatment.
• The 28-round magazine capacity gives you a deep load for training drills, competition stages, or any application where round count per magazine matters.
• The suppressor-ready muzzle and gas piston system make this pistol a natural fit for a can from day one, and you can mount a compatible SIG suppressor without any gunsmithing once your paperwork clears.
• If you want a modular, compact, and suppressor-forward 7.62×39 platform that performs reliably across diverse ammunition types and grows with your accessory setup, the SIG Sauer MCX Spear-LT puts the full MCX pedigree in a pistol-configuration package.

The SIG Sauer MCX Spear-LT (PMCX762R11BLT) in 7.62x39mm is a dependable option for the shooter who wants a compact, gas piston-driven, suppressor-ready platform built on one of the most field-tested modular rifle systems available.