SIG MCX-Spear LT
SIG Sauer Inc. · Rifle · In Production · 2022
Also known as: MCX Spear LT, MCX-SPEAR LT
Overview
The SIG MCX-Spear LT is a lightweight, multi-caliber gas-piston carbine introduced by SIG Sauer in 2022 as a downsized civilian companion to the 6.8mm MCX Spear. Built on the third-generation MCX platform, it uses a short-stroke gas piston operating system and a tool-less quick-change barrel system that allows the user to switch between 5.56 NATO, .300 AAC Blackout, and 7.62x39mm chamberings. The rifle features fully ambidextrous controls, a non-reciprocating side-charging handle, an M-LOK free-floating handguard, and a side-folding adjustable stock. The 16-inch 5.56 NATO rifle weighs approximately 7 lbs 7 oz unloaded.
Specifications
| Weight (empty) | 3374 g (119.0 oz) |
| Overall Length | 876 mm (34.49") |
| Folded Length | 667 mm (26.26") |
| Barrel Length | 406 mm (15.98") |
| Action Type | Gas Operated Short Stroke Piston |
| Firing Mechanism | Hammer Fired |
| Trigger Type | Two Stage |
| Trigger Pull | 16 N (3.6 lbf) |
| Magazine Capacity | 30 rounds |
| Magazine Type | Detachable Box |
| Effective Range | 500 m (547 yd) |
| Barrel Rifling | Right Hand |
| Rifling Twist | 178 mm (7.01") |
| Number of Grooves | 6 |
| Frame Material | Forged Aluminum Alloy |
| Barrel Material | Steel |
| Stock Material | Polymer |
| Finish | Cerakote |
Calibers
- 5.56x45mm NATO · primary · 5.56mm NATO — also known as 5.56 NATO, .223 Remington, 5.56x45mm
- .300 AAC Blackout — also known as 300 BLK, 300 Blackout, 7.62x35mm
- 7.62x39mm — also known as 7.62x39, 7.62 Soviet, M43
Features
- Firing modes: Semi Automatic
- Feed systems: Detachable Box Magazine
- Safety mechanisms: Ambidextrous Safety Selector, Firing Pin Block
- Features: Folding Stock, Adjustable Stock, Free Floating Barrel, M Lok Handguard, Ambidextrous Controls, Quick Change Barrel, Multi Caliber, Picatinny Rail, Short Stroke Gas Piston, Non Reciprocating Charging Handle, Suppressor Ready, Threaded Barrel, Flat Blade Trigger
Variants
- SIG MCX-Spear LT SBR (11.5") — Short Barreled Rifle
- SIG MCX-Spear LT Pistol — Pistol
Production
Production years: 2022-present
Origin
Country of origin: United States
Designer: SIG Sauer Engineering Team
Notes
MSRP approx $2,799. Offered in 16" rifle, 11.5" SBR, and pistol configurations. The .300 BLK pistol/SBR uses a 9" barrel. Two-stage flat-blade trigger breaks at roughly 3.5 lbs. Folded length is approximately 26.25 inches on the 16" rifle. Coyote-brown anodized finish with black accents on standard models.
Background
The MCX-Spear LT is part of SIG's effort to bring the ergonomics of its US Army NGSW-winning MCX Spear platform to a lighter, more affordable carbine that civilians and law enforcement could run in conventional intermediate calibers.