Availability: In Stock
The Sig Sauer MCX Spear in 6.8x51 represents a watershed moment in civilian rifle access. This short-barrel rifle (SBR) with a 13-inch barrel brings military-proven engineering to the American shooter — the same platform the U.S. Army selected as its Next Generation Squad Weapon. The MCX Spear isn't hype; it's a semi-automatic, piston-driven rifle built on cold hammer-forged steel, designed for shooters who demand reliability, modularity, and modern performance without compromise.
What sets the MCX Spear apart is its thoughtful design language. The ambidextrous bolt catch and release, combined with rear and non-reciprocating side charging handles, make it equally at home in either hand. The 2-Stage Matchlite Duo trigger is curved and tuned for precision. The Magpul SL-M stock folds and telescopes, keeping your profile compact without sacrificing adjustability. Your 20-round steel magazine is included; the gun accepts AR-10 pattern magazines, so you'll find ammunition and spares readily available. The free-floating M-LOK handguard features an easily tunable 2-position gas valve, so you can dial in the operating system to your ammunition and environmental conditions.
The 6.8x51 cartridge is the real story here. Paired with a 1:7 twist barrel and threaded 5/8"-24 for suppressors or flash hiders, the MCX Spear is engineered to deliver advanced ballistic performance. Coyote anodizing gives you a durable, professional finish that resists wear. At 8.9 pounds with magazine, it's handy enough for close-quarters work yet built on a platform that scales — the MCX Spear supports caliber conversion between 6.8x51, 7.62x51, and 6.5 Creedmoor with 13- or 16-inch barrel options, so you can adapt to your mission as your needs evolve.
This is a rifle for hunters and shooters who want current-generation ergonomics and reliability, backed by professional adoption and a platform designed to endure.
| Caliber | 6.8x51 |
| Barrel Length | 13 inches |
| Barrel Material | Cold hammer-forged steel |
| Barrel Twist Rate | 1:7 |
| Muzzle Threads | 5/8"-24 |
| Action Type | Semi-automatic |
| Operating System | Gas piston with adjustable 2-position gas valve |
| Trigger | 2-Stage Matchlite Duo, curved |
| Stock | Magpul SL-M, folding and telescoping |
| Grip | Polymer |
| Handguard | M-LOK alloy with free-floating barrel |
| Charging Handle | Rear and non-reciprocating steel side handle |
| Controls | Fully ambidextrous bolt catch and release |
| Magazine | One 20-round SIG-designed steel magazine (AR-10 pattern) |
| Sights | Optics ready (no iron sights) |
| Receiver Finish | Coyote anodized |
| Overall Length (Folded) | 8 inches |
| Overall Width | 2.5 inches |
| Overall Height | 8 inches |
| Weight (with Magazine) | 8.9 pounds |
The MCX Spear accepts AR-10 pattern magazines. One 20-round SIG-designed steel magazine is included with the rifle, so you can shoot right out of the box. Additional AR-10 magazines are widely available from many manufacturers.
Yes. The MCX Spear platform supports caliber conversion between 6.8x51, 7.62x51, and 6.5 Creedmoor, and you can swap between 13- and 16-inch barrel lengths. This modularity means you can adapt the rifle to different hunting seasons, ammunition availability, or ballistic requirements without buying a second gun.
No. The MCX Spear is optics-ready, designed for you to mount your own rifle scope or red dot sight. There are no factory iron sights, but the receiver is set up for standard optic mounting.
Yes. The barrel is threaded 5/8"-24, the standard for rifle suppressors and muzzle devices. You can attach a suppressor, flash hider, or other compatible device to the muzzle.
SKU: 145479948 • Weight: 9oz
Availability: In Stock
The Sig Sauer MCX Spear in 6.8x51 represents a watershed moment in civilian rifle access. This short-barrel rifle (SBR) with a 13-inch barrel brings military-proven engineering to the American shooter — the same platform the U.S. Army selected as its Next Generation Squad Weapon. The MCX Spear isn't hype; it's a semi-automatic, piston-driven rifle built on cold hammer-forged steel, designed for shooters who demand reliability, modularity, and modern performance without compromise.
What sets the MCX Spear apart is its thoughtful design language. The ambidextrous bolt catch and release, combined with rear and non-reciprocating side charging handles, make it equally at home in either hand. The 2-Stage Matchlite Duo trigger is curved and tuned for precision. The Magpul SL-M stock folds and telescopes, keeping your profile compact without sacrificing adjustability. Your 20-round steel magazine is included; the gun accepts AR-10 pattern magazines, so you'll find ammunition and spares readily available. The free-floating M-LOK handguard features an easily tunable 2-position gas valve, so you can dial in the operating system to your ammunition and environmental conditions.
The 6.8x51 cartridge is the real story here. Paired with a 1:7 twist barrel and threaded 5/8"-24 for suppressors or flash hiders, the MCX Spear is engineered to deliver advanced ballistic performance. Coyote anodizing gives you a durable, professional finish that resists wear. At 8.9 pounds with magazine, it's handy enough for close-quarters work yet built on a platform that scales — the MCX Spear supports caliber conversion between 6.8x51, 7.62x51, and 6.5 Creedmoor with 13- or 16-inch barrel options, so you can adapt to your mission as your needs evolve.
This is a rifle for hunters and shooters who want current-generation ergonomics and reliability, backed by professional adoption and a platform designed to endure.
| Caliber | 6.8x51 |
| Barrel Length | 13 inches |
| Barrel Material | Cold hammer-forged steel |
| Barrel Twist Rate | 1:7 |
| Muzzle Threads | 5/8"-24 |
| Action Type | Semi-automatic |
| Operating System | Gas piston with adjustable 2-position gas valve |
| Trigger | 2-Stage Matchlite Duo, curved |
| Stock | Magpul SL-M, folding and telescoping |
| Grip | Polymer |
| Handguard | M-LOK alloy with free-floating barrel |
| Charging Handle | Rear and non-reciprocating steel side handle |
| Controls | Fully ambidextrous bolt catch and release |
| Magazine | One 20-round SIG-designed steel magazine (AR-10 pattern) |
| Sights | Optics ready (no iron sights) |
| Receiver Finish | Coyote anodized |
| Overall Length (Folded) | 8 inches |
| Overall Width | 2.5 inches |
| Overall Height | 8 inches |
| Weight (with Magazine) | 8.9 pounds |
The MCX Spear accepts AR-10 pattern magazines. One 20-round SIG-designed steel magazine is included with the rifle, so you can shoot right out of the box. Additional AR-10 magazines are widely available from many manufacturers.
Yes. The MCX Spear platform supports caliber conversion between 6.8x51, 7.62x51, and 6.5 Creedmoor, and you can swap between 13- and 16-inch barrel lengths. This modularity means you can adapt the rifle to different hunting seasons, ammunition availability, or ballistic requirements without buying a second gun.
No. The MCX Spear is optics-ready, designed for you to mount your own rifle scope or red dot sight. There are no factory iron sights, but the receiver is set up for standard optic mounting.
Yes. The barrel is threaded 5/8"-24, the standard for rifle suppressors and muzzle devices. You can attach a suppressor, flash hider, or other compatible device to the muzzle.
SKU: 145479948 • Weight: 9oz