Description
The SIG SAUER MCX-SPEAR LT IR 300 BLK 9″ SBR is a factory-configured short-barreled rifle built for advanced performance. This model features a monolithic upper receiver machined from 7075-T6 aluminum with a hard-coat anodized finish, ensuring durability and compatibility with standard AR-15 lower receivers. Its 9-inch cold hammer-forged barrel is optimized for 300 Blackout ammunition, making it a highly capable and compact platform for specialized applications.
Key Features
- Factory SBR with 9-inch cold hammer-forged 300 BLK barrel
- Monolithic 7075-T6 aluminum upper receiver with M-LOK handguard
- Includes SIG SAUER IR (Infrared) laser aiming module
- Short-stroke piston operating system for reliable suppressed fire
- Two-position folding and telescoping SIG MINI stock
Specifications
| Caliber / Type | 300 AAC Blackout SBR |
|---|---|
| Material | 7075-T6 Aluminum |
| Finish | Hard-Coat Anodized |
| Compatibility | Standard AR-15 Lower Receivers |
| Weight | Approx. 6.2 lbs (unloaded) |
The 300 Blackout cartridge is engineered for optimal ballistic performance from short barrels, maintaining effective energy with subsonic or supersonic loads. The MCX-SPEAR LT’s piston system reduces fouling and heat transfer to the receiver, enhancing reliability with suppressors. This configuration is designed for close-quarters scenarios where a compact, hard-hitting package with integrated IR capability is required for low-visibility engagements.




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