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 delivers a purpose-built platform for shooters who demand reliability without unnecessary weight. Chambered in 5.56mm NATO, this rifle is engineered from the ground up by Springfield Armory, a manufacturer with decades of firearms experience. The Saint series is designed to provide consistent performance out of the box, featuring a free-floating M-Lok handguard that reduces weight and allows for direct accessory mounting. Whether for home defense, range training, or three-gun competition, the Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-Lok rail offers a balanced, ready-to-run configuration that meets the needs of serious shooters.

Features & Specs

Built with a focus on accuracy and durability, the Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-Lok rail includes components that enhance handling and longevity. The rifle is chambered in 5.56mm NATO and accepts standard AR-15 magazines. The M-Lok rail system provides continuous attachment points for lights, grips, and bipods without adding bulk. A mid-length gas system ensures smooth cycling and reduced recoil impulse. The barrel is cold hammer-forged and features a 1:8 twist rate, stabilizing a wide range of bullet weights from 55 to 77 grains. The forged aluminum lower receiver includes an enhanced trigger with a crisp break, while the bolt carrier group is nickel boron coated for easier cleaning and increased corrosion resistance.

• Caliber: 5.56mm NATO; 1:8 twist cold hammer-forged barrel
• Handguard: Free-floating M-Lok rail with continuous top Picatinny
• Gas system: Mid-length with low-profile gas block

Who It’s For

This rifle is intended for the civilian shooter who requires a dependable, no-nonsense carbine. The Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-Lok rail suits first-time AR buyers who want a complete, factory-assembled firearm without the need for aftermarket upgrades. It also appeals to experienced shooters who value a lightweight platform for tactical training or competition. Law enforcement professionals and security personnel will appreciate the reliability of the Saint series in high-round-count scenarios. Because it ships with standard mil-spec components, it is compatible with a vast ecosystem of parts and accessories, making it a practical choice for anyone building a versatile rifle collection. The M-Lok rail provides the flexibility to attach necessary equipment without adding unnecessary weight.

• Civilian shooters seeking a ready-to-use AR-15 with modern rail system
• Competitors and trainers who need consistent performance under rapid fire
• Law enforcement and security personnel requiring a reliable patrol rifle

Shipping & FFL

This firearm must ship to a Federal Firearms License (FFL) holder in your state of residence. After placing your order, you will receive a confirmation email with instructions to provide the shipping FFL’s contact information. We cannot ship to P.O. boxes or to non-FFL addresses. It is your responsibility to confirm that the Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-Lok rail is legal to own in your state, county, and municipality. Some states and localities have restrictions on magazine capacity, barrel length, or feature configurations. Please verify local laws before ordering. Standard shipping rates apply, and delivery typically occurs within 5 to 7 business days after the FFL has been verified. The receiving FFL may charge a transfer fee, which is not included in the purchase price. We do not accept returns on firearms, so inspect the rifle at the FFL before accepting transfer.

• Must ship to a valid FFL dealer; no direct-to-consumer delivery
• Buyer is responsible for compliance with all local, state, and federal laws
• Transfer fees, if any, are set by the receiving FFL and are not included