Description
The SIG SAUER MCX-SPEAR 6.8×51 SBR is a factory-built short-barreled rifle designed for advanced performance. This model features a durable 6.75-inch cold hammer-forged barrel chambered in the high-pressure 6.8x51mm (.277 Fury) cartridge. Its monolithic upper receiver, ambidextrous controls, and folding/telescoping stock define a next-generation platform built for adaptability and hard use. The corrosion-resistant nitride finish ensures longevity in demanding conditions.
Key Features
- Factory SBR with 6.75″ cold hammer-forged barrel in 6.8x51mm (.277 Fury)
- Patented gas piston operating system for reliable function and reduced fouling
- Monolithic upper receiver with full-length M-LOK handguard for accessory mounting
- Folding and telescoping SIG MINI stock for compact storage and transport
- Full ambidextrous controls including safety, bolt release, and magazine catch
Specifications
| Caliber / Type | 6.8x51mm (.277 Fury) / Short-Barreled Rifle (SBR) |
|---|---|
| Material | Aluminum Alloy Receiver, Steel Barrel |
| Finish | Nitride |
| Compatibility | MCX-SPEAR platform accessories and handguards |
| Weight | Approx. 7.5 lbs (unloaded) |
The 6.8x51mm cartridge delivers superior ballistics from short barrels, maintaining high velocity and energy. The MCX-SPEAR’s patented short-stroke piston system is engineered to handle this round’s 80,000 PSI pressure safely, reducing heat transfer to the bolt and receiver. This design ensures sustained reliability for tactical applications, where compact size and terminal performance are critical factors.
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