Description
The Shop MCX-SPEAR LT IR 300 BLK 9″ SBR is a factory-built short-barreled rifle from SIG Sauer’s next-generation MCX platform. This model features a 9-inch cold hammer-forged barrel chambered in 300 BLK, a hard-anodized aluminum upper receiver, and a folding/telescoping minimalist stock. Its integrated M-LOK handguard and ambidextrous controls provide a modern, adaptable foundation for optics and IR aiming devices, delivering a compact and suppressor-ready package.
Key Features
- Factory SBR with 9″ cold hammer-forged 300 BLK barrel
- Hard-anodized 7075-T6 aluminum upper and lower receiver
- Integrated folding and telescoping minimalist stock
- Full-length M-LOK handguard for direct accessory mounting
- Ambidextrous non-reciprocating charging handle and controls
Specifications
| Caliber / Type | 300 AAC Blackout / Factory SBR |
|---|---|
| Material | 7075-T6 Aluminum / Steel Barrel |
| Finish | Hard Coat Anodized / Nitride |
| Compatibility | SIG MCX-SPEAR LT / Legacy MCX Uppers |
| Weight | Approx. 6.2 lbs (unloaded) |
The 300 BLK cartridge is engineered for optimal performance from short barrels, achieving full powder burn and reliable cycling in the 9″ configuration. This SBR is designed for use with a sound suppressor, maximizing subsonic ammunition’s capabilities for reduced signature. The gas piston operating system runs cleaner and cooler than direct impingement, enhancing reliability with a wide range of ammunition pressures.




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