Sig Sauer MCX Spear LT SBR 11.5 5.56 NATO

Specifications

Description

10″ Lightweight Ergonomic Handguard
SIG Flatblade Match Trigger
Fully Ambidextrous Controls
Interchangeable Barrel
SIG QD Suppressor-Ready Flash Hider

SIG Sauer MCX-SPEAR LT 11.5"-barrel Pistol

The SIG SAUER MCX-SPEAR-LT 11.5″-barrel pistol is an impressive addition to the celebrated MCX platform, known for its cutting-edge technology and unmatched performance. This firearm offers a lightened handguard for better maneuverability without sacrificing strength, making it easier to handle in any situation. The ergonomic design ensures a comfortable grip, allowing for precise control whether you’re at the range or out in the field. With its advanced barrel technology and enhanced trigger system, you can expect remarkable accuracy and consistency with every shot. The pistol is also equipped with ambidextrous controls, making it user-friendly for both left and right-handed shooters. These features collectively contribute to its versatility, whether for professional or recreational use. Engineered for excellence, the MCX-SPEAR-LT is designed to meet the needs of modern shooters, offering a reliable and exceptional shooting experience. You can rent the model equipped with the Eotech EXPS3 holographic sight at GRITR Range to try it out.

SIG MCX Quick Guide

The SIG MCX is a modular rifle platform that allows shooters to easily change calibers, barrels, and configurations to suit different needs. Key features of the MCX include its short-stroke gas piston system for increased reliability, ergonomic enhancements, and compatibility with advanced suppressors.

The XM7 is a military version of the MCX Spear. It’s built to replace the M4, offering compatibility with more powerful calibers like the new 6.8x51mm, which provides greater range and stopping power.

Is MCX an AR-15?

The SIG MCX may look like America’s beloved rifle, but it’s not an AR-15. There are a few differences in the internal design. The MCX uses a short-stroke gas piston system. In this system, the gas pushes on the piston, which redirected it onto a rod above the barrel, pushing the rod slightly forward. This moves the BCG back into the receiver, ejecting the spent casing. The spring then returns the bolt to the chamber, loading the next round. Unlike the AR-15, the MCX doesn’t need a buffer tube or spring, making it more compact and allowing for various stock attachments.

Actually, the gas system of the SIG MCX makes it technically closer to the AK-47 platform, which uses a long-stroke gas system.

The MCX’s gas system is cleaner than AR15, allowing you to shoot longer before needing to clean. While this doesn’t guarantee more reliability, it can extend the gun’s lifespan. It’s also better for use with suppressors, as it vents gas away from the chamber, making shooting more comfortable.

Overview of MCX Rifles

Sig Sauer MCX, Gen 1 (2015)

MCX Patrol: This was the standard version with a 16-inch barrel.
MCX SBR: A compact version with a 9-inch barrel.
MCX Pistol: A pistol version with a 9-inch barrel; it came with either the SBX pistol stabilizing brace or the PCB (pistol pivoting contour folding brace).
MCX LVAW: This model was only available to the military and LE and featured a short barrel, suppressor, and select-fire capabilities.

Sig Sauer MCX Virtus, Gen 2 (2017)

MCX Virtus Patrol: Like the previous Patrol, it had a 16-inch barrel and a 1:7-inch twist rate; the upgrades included a custom Sig Matchlite Duo Trigger for better accuracy. It featured a folding stock and interchangeable barrels.
MCX Virtus SBR: A compact version with an 11.5-inch barrel for the 5.56 NATO and a 9-inch barrel for the .300 AAC Blackout.
MCX Virtus Pistol: A pistol version with an 11.5-inch barrel for the 5.56 NATO and a 9-inch barrel for .300 AAC Blackout; featured an SBX stabilizer brace.

Sig Sauer MCX Rattler

This is a super compact SBR for personal defense available in .300 BLK and 5.56, boasting a 5.5-inch barrel and a Picatinny rail for attaching grips or braces.

Sig Sauer MCX Spear & Spear LT, Gen 3 (2022)

The MCX-SPEAR platform features a new padded, side-folding stock with an FDE finish. Civilian models are called “SPEAR LT,” while military versions are known as “MCX LT” or “MCX Lightweight.” Key features include a lighter handguard and barrel design, ambidextrous bolt catch and release, and a proprietary SL muzzle device for SIG’s suppressors. It comes in a new coyote brown finish, with black also available. The civilian model has an 11.5-inch or 16-inch barrel and a Picatinny rail for stock or brace attachment. The military model offers additional 14.5-inch and 9-inch barrels and a two-stage match-grade trigger. It is available in 5.56 mm NATO, .300 Blackout, and 7.62x39mm, with custom 28-round magazines.

M13 and MCX

The M13 is actually a fictional firearm featured in the Call of Duty video game series. It was designed off the SIG MCX Virtus. The M13 design elements are inspired by the modular features and tactical advancements of the MCX Virtus.

Sig MCX vs MPX

The SIG MCX and MPX serve different purposes. The MCX series is built as a versatile rifle platform, available in powerful calibers like 5.56 NATO, 7.62 NATO, 300 BLK, 7.62×39, and 6.8×51. While the series includes models like the MCX Rattler, designed as a personal defense weapon with a compact build, it’s mainly built for longer-range tactical applications.

In contrast, the MPX is a series of pistol caliber carbines, often compared to the HK MP5, designed for 9mm cartridges. This makes it ideal for range shooting, PCC competitions, and personal defense.

FAQs

Is SIG MCX better than AR-15?

This largely depends on what the user values in a firearm. The MCX is known for its modularity and ability to easily swap barrels and calibers, making it versatile for different shooting needs. It also has a more innovative design with enhanced features such as an adjustable gas system. Plus, due to its internal design, the MCX can accept any stock and is a generally cleaner-shooting rifle than the AR-15. However, the AR-15 is praised for its extensive aftermarket support and customization options, making it a favorite among many shooters.

Can a civilian buy a SIG MPX?

Yes, civilians can purchase the SIG MPX, precisely the SPEAR, SPEAR LT, and Rattler variants. It is available in semi-automatic versions in three configurations – standard rifle, SBR, and pistol.

What does MCX mean?

In SIG’s terminology, “MCX” stands for “Mission Configurable Weapons System,” which reflects the rifle’s core design philosophy of modularity. Most parts of the MCX are interchangeable, allowing users to adapt the firearm quickly for various roles and calibers.

Can the MCX shoot .223?

Yes, if your SIG MCX is chambered for the 5.56 NATO, it can shoot .223 Rem ammo right out of the box. To shoot other calibers, you need to reconfigure it with the right parts.

Is the SIG MCX replacing the M4?

While the SIG MCX is a modern, cutting-edge option that some military and law enforcement units are exploring, it is not officially replacing the M4 across the board. The transition from the M4 to the MCX would depend on individual military branches’ procurement decisions and operational requirements.

What ammo does the SIG MCX Spear use?

The SIG MCX Spear is designed to use various calibers, including 5.56 NATO & 7.62 NATO (official AR calibers), 300 BLK (second most popular AR-15 caliber), 7.62×39 (standard AK-47 caliber), and 6.8×51 (the new cartridge by SIG, aka .277 Fury). The specific ammunition used will depend on the variant and configuration chosen.