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 is a direct-impingement carbine built for reliability and accuracy out of the box. Springfield Armory designed this model as a no-compromise duty-ready platform, combining a 16-inch chrome-moly vanadium barrel with a free-float M-Lok handguard for consistent shot placement. This rifle ships with a forged 7075 T6 aluminum upper and lower receiver, a carbine-length gas system, and a full-length Picatinny top rail for mounting optics. The Saint series has earned a reputation for tight tolerances and immediate readiness, requiring no upgrades before range or field use.

• 16-inch chrome-moly vanadium barrel with Melonite finish for corrosion resistance and extended barrel life
• Free-float M-Lok handguard reduces weight and allows direct accessory mounting without barrel interference
• Forged 7075 T6 aluminum upper and lower receivers for consistent strength and dimensional stability

Features and Specs

Every component of the Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-Lok rail is selected for function. The barrel features a 1:8 twist rate, stabilizing both 55-grain and 77-grain ammunition with equal precision. The bolt carrier group is shot-peened and high-pressure tested, with a nickel boron coated carrier for reduced friction and easier cleaning. The M-Lok handguard is slim and heat-resistant, and the buffer system includes an H-MIL-SPEC heavy buffer to reduce felt recoil. The rifle includes a two-stage match trigger with a 4.5- to 5-pound pull weight, offering a clean break without creep.

• Two-stage match trigger: 4.5 – 5 pound pull weight for consistent precision shooting
• Nickel boron coated bolt carrier: reduced friction, easier maintenance, and enhanced corrosion protection
• H-MIL-SPEC heavy buffer: reduces muzzle rise and improves follow-up shot speed

Who It Is For

The Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-Lok rail is built for shooters who need a rifle that performs without modification. It suits law enforcement officers seeking a reliable patrol carbine, competitive shooters in two-gun or three-gun matches who demand consistent trigger pulls and fast handling, and civilian owners who want a durable home defense or training rifle. The free-float handguard and match-grade trigger make it equally effective for precision shooting at intermediate ranges. This rifle also appeals to those building a collection of American-made firearms, as it is assembled in the United States with domestic components.

• Law enforcement and security professionals requiring a duty-ready carbine
• Competition shooters needing a two-stage trigger and free-float barrel for accuracy
• Civilian owners seeking a reliable, no-upgrade rifle for defense or training

Shipping and FFL

This Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-Lok rail will ship to a Federal Firearms License (FFL) dealer of your choice. You must select a dealer during checkout. We ship within three business days via a carrier with adult signature required. All federal, state, and local laws apply. It is your responsibility to confirm that the receiving FFL accepts transfers and that the rifle is legal in your jurisdiction. We cannot ship to PO boxes or international addresses. If you have questions about FFL requirements, contact our customer service team before placing your order.