The Sig Sauer MCX-SPEAR LT .300 Blackout is the next step in the evolution of the MCX platform, designed to meet the demands of tactical professionals and firearm enthusiasts alike. Available in a Coyote anodized finish, this firearm integrates advancements inspired by the MCX Virtus and the U.S. Army-selected M5 SPEAR to deliver unmatched performance, reliability, and adaptability. Whether you choose the pistol variant or the factory Short Barreled Rifle (SBR), the SPEAR LT is built to excel in CQB, personal defense, and other mission-critical applications.
Drawing on decades of feedback from military operators and competitive shooters, the MCX-SPEAR LT incorporates key upgrades to deliver a platform that’s lighter, more ergonomic, and field-ready. The M-LOK free-floating handguard ensures compatibility with modern accessories while maintaining rigidity, critical for keeping laser aiming devices and optics zeroed under repeated use. Its carbon steel barrel with a 1:5 twist rate optimizes performance for .300 Blackout, offering exceptional accuracy for both supersonic and subsonic rounds.
The inclusion of a Flat Blade Match Trigger provides a crisp, precise pull and maintains compatibility with most AR-15 triggers, allowing users to customize the system to their needs. Ambidextrous bolt catch and controls simplify operation and malfunction clearance, making this firearm an ideal choice for right- or left-handed users.
Built to endure harsh environments, the Coyote anodized receivers offer improved durability, and steel-reinforced QD sling points provide tactical flexibility. Designed to pair seamlessly with Sig Sauer Clutch-LOK suppressors, the MCX-SPEAR LT is optimized for suppressed shooting straight out of the box.
The MCX-SPEAR LT Pistol features a Picatinny rail section at the rear of the lower receiver, allowing the attachment of a brace or stock (with proper NFA compliance). For those opting for the SBR variant, the firearm comes equipped with a minimalist folding stock that combines stability and compactness. The SBR is an NFA-regulated item requiring transfer through an NFA dealer, including the payment of a tax stamp and completion of a Form 4.
The Sig Sauer MCX-SPEAR LT .300 Blackout is purpose-built for professionals who demand peak performance in every scenario. Its rugged design, user-focused enhancements, and modern compatibility with accessories make it an essential tool for CQB, tactical missions, and personal defense. With its Coyote anodized finish, ambidextrous controls, and suppressor-ready features, the SPEAR LT delivers everything you need in a cutting-edge firearm.
The Sig Sauer MCX-SPEAR LT is purpose-built for short-barreled applications, making it an exceptional choice for self-defense, close-quarters combat, and covert operations. With a 9-inch carbon steel barrel and a 1:5 twist rate, the platform maximizes the ballistic potential of the .300 Blackout round, ensuring reliability and precision with both supersonic and subsonic ammunition. The .300 BLK’s ability to maintain effectiveness in shorter barrels, combined with its compatibility with suppressors, makes it ideal for scenarios where maneuverability, reduced sound signature, and stopping power are critical. Sig’s advancements, such as the lightweight M-LOK handguard and ambidextrous controls, further enhance the MCX-SPEAR LT’s utility as a compact, versatile, and highly adaptable firearm for mission-critical tasks.
| Specification | Details |
|---|---|
| Caliber | .300 Blackout |
| Barrel Length | 9 inches |
| Twist Rate | 1:5 |
| Threads | 5/8x24 |
| Operating System | Gas Piston, Semi-Auto |
| Trigger Type | Flat Blade Match Trigger |
| Fore-End | Free-floating, ergonomic M-LOK handguard |
| Receiver Finish | Coyote Anodized |
| Overall Length | Pistol: 18.8"; SBR: 27.75" |
| Weight | Pistol: 5.6 lbs; SBR: 6.4 lbs |
| Stock Type | Pistol: None; SBR: Minimalist folding stock |
| Magazine | 30-round polymer (AR-15 compatible) |
Buying and shipping through Charlie’s is easy, but there is some information you need to know. This item must ship to FFL holder. No civilian exceptions.
1) Check your state laws to make sure the federally regulated item you want to purchase is legal in your state.
2) Find your FFL… Have your dealer send us a copy of their FFL to Charlie’s (Make them earn their fee!!!)
3) Be patient! You should hear from our compliance department within 3-4 business days. If not, feel free to reach out for a status update.
That’s it! We try to make this process as simple as possible for our customers. Please click the “Buying a Firearm” tab at the top of this page for more information.
California residents, click here. The process may be different due to state specific laws.
NOTE: The free shipping option does not apply to full rifles, unless purchased with a scope. If you choose free shipping at check-out, we will bill you for shipping later.
Sig Sauer
Sig Sauer
