Springfield Saint 5.56Mm Semi-Automatic Ar-15 Rifle With M-Lok Rail

Overview

The Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-Lok rail represents a precision-engineered entry in the modern sporting rifle category. Chambered in 5.56 NATO, this platform delivers reliable semi-automatic operation through a direct impingement gas system. The rifle features a 16-inch chrome-moly vanadium steel barrel with a 1:8 twist rate, optimizing stabilization for both 55-grain and 62-grain projectiles. Springfield Armory integrates a forged 7075 T6 aluminum upper and lower receiver, ensuring structural integrity under sustained use. The free-float M-Lok handguard provides a continuous mounting surface for accessories while reducing weight compared to traditional quad-rail systems. This configuration balances maneuverability with accuracy, making it a competitive option within its category. Each rifle includes a Magpul MBUS flip-up rear sight and a Magpul MOE SL grip and stock, enhancing ergonomics without requiring immediate aftermarket upgrades.

Features & Specs

The Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-Lok rail incorporates several design elements focused on operational consistency. The bolt carrier group features a shot-peened, MPI-tested bolt with a nickel boron coating for enhanced lubricity and corrosion resistance. The barrel is button-rifled and features a 1/2×28 threaded muzzle with a Springfield Armory double-baffle brake designed to mitigate recoil and muzzle rise. The M-Lok rail system runs 12 inches in length and includes a full-length Picatinny top rail for optics mounting.

• Caliber: 5.56 NATO (accepts .223 Remington)
• Barrel Length: 16 inches with 1:8 twist and M4 feed ramps
• Weight: 6 pounds 13 ounces unloaded
• Overall Length: 32.5 to 35.75 inches (collapsible stock)
• Trigger: Nickel boron coated single-stage, 5.5-6.5 pound pull
• Gas System: Carbine length, direct impingement with low-profile gas block
• Handguard: Free-float M-Lok aluminum rail with heat shield

The rifle ships with one Magpul 30-round PMAG magazine and a padded soft case. The lower receiver is marked for both safe and semi-automatic positions and uses a standard AR-15 fire control group. All metal surfaces receive a Mil-Spec Type III hard coat anodized finish.

Who It Is For

This Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-Lok rail suits shooters seeking a factory-built, no-compromise platform for target shooting, varmint control, or home defense applications. The mid-length gas system and M-Lok handguard appeal to users who intend to mount lights, lasers, or vertical grips without the bulk of older rail designs. The 1:8 twist barrel accommodates a wide range of commercial ammunition, and the nickel boron bolt carrier group reduces cleaning intervals for those who train regularly. Newer shooters transitioning from bolt-action or shotgun platforms will find the manual of arms consistent with standard AR-15 operation, while experienced users will appreciate the factory-upgraded components that eliminate common first-stage modifications. The rifle is not intended for competitive long-range shooting beyond 600 yards due to its carbine-length gas system and barrel profile, but it remains effective for intermediate-range engagements.

Shipping & FFL

This product ships via UPS Ground or FedEx Home Delivery to a Federal Firearms License (FFL) dealer in your state. Upon placing your order, you must provide the current FFL license for your chosen receiving dealer via email or fax. We cannot ship to PO boxes or APO addresses. After the rifle arrives at your selected FFL dealer, you must complete a Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) Form 4473 and pass a NICS background check prior to taking possession. All federal, state, and local laws apply; it is your responsibility to verify that the Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-Lok rail is legal to own in your jurisdiction before ordering. Some states and municipalities may have additional restrictions on magazine capacity, barrel length, or feature configurations. We do not offer returns on firearms; any warranty issues should be directed to Springfield Armory customer service. Orders ship within 5-10 business days after FFL verification. Signature may be required upon delivery.