Description
SIG Sauer MCX-SPEAR LT IR 300 BLK Pistol, 9" Barrel, FDE, 30-Round
The SIG SPEAR LT 300 Blackout is SIG’s lighter folding MCX. The MCX is the piston rifle SIG has been refining for years: a short-stroke system that does not need a buffer tube, a fold, and fully ambidextrous controls. SPEAR LT lightens the handguard so it stays quick in the hands.
You get an adjustable gas valve and SIG’s flat-blade match trigger. The top rail is optic-ready. A factory optic is not installed. SIG fits a QD flash hider meant for SIG SLX and SLH suppressors; that is not a claim that every can mounts.
This configuration
You get an adjustable gas valve and SIG’s flat-blade match trigger. Bolt catch, bolt release, magazine release, selector, and charging handle are ambidextrous. The top rail is optic-ready. A factory optic is not installed. SIG fits a QD flash hider meant for SIG SLX and SLH suppressors; that is not a claim that every can mounts. This configuration ships as a pistol with SIG’s folding PCB. This SPEAR LT is the 9 in. 300 BLK pistol in Gen II NiR FDE Cerakote, SIG’s reduced-IR finish. SIG includes a folding PCB and one 30-round polymer magazine. Folded length is 16.38 in. Overall length is 27.5 in. Weight is 5.6 lb. Twist is 1:5. Muzzle threads are 5/8-24.
What ships
A factory optic is installed only when this page says so. This item ships to a licensed FFL. See the SIG MCX SPEAR LT collection.
Specifications and Included Items
- Model: PMCX-300B-9B-IR
- Platform: MCX-SPEAR LT IR pistol
- Caliber: 300 BLK
- Barrel: 9 in. cold-hammer-forged carbon steel
- Twist: 1:5
- Overall length: 27.5 in.; 16.38 in. folded
- Width: 2.9 in.
- Height: 7.5 in.
- Weight: 5.6 lb
- Threads: 5/8-24
- Muzzle: Rocksett SIG QD suppressor-ready flash hider
- Operating system: Short-stroke piston, adjustable gas
- Trigger: SIG flat-blade match
- Brace: Folding PCB; pistol configuration
- Finish: Gen II NiR FDE Cerakote
- Magazines included: One 30-round polymer magazine
- Sights: Optic-ready rail; no factory optic
- FFL: Pistol; ships to a licensed FFL dealer












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