Springfield Saint 5.56mm Semi-Automatic AR-15 Rifle With M-LOK Rail

Overview

When you pick up the Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-LOK rail, you feel the difference in build quality right away. This is not a budget build that shakes itself loose after a few range trips. Springfield Armory designed this rifle as a no-compromise, direct-impingement platform for shooters who want reliability out of the box without having to swap a dozen parts. The 16-inch barrel with a mid-length gas system gives you a softer recoil impulse than a carbine-length system, and the free-float M-LOK handguard keeps your support hand cool while offering plenty of real estate for accessories. Whether you are topping off a magazine for the first time or you have a safe full of ARs, the Saint earns its place as a go-to carbine.

Features & Specs

Let us walk through what makes this rifle tick. The Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-LOK rail ships with a forged 7075 T6 aluminum upper and lower receiver, which is the same material used in duty-grade rifles. The bolt carrier group is shot-peened and MPI-tested, and it features a carpenter 158 steel bolt. The trigger is a nickel-boron coated single-stage unit that breaks cleanly at around 5.5 pounds, with minimal take-up. The M-LOK free-float handguard is slim and lightweight, and it gives you continuous top rail space for optics. Out front, the muzzle is capped with a Springfield Armory branded flash hider, and the barrel is chrome-moly vanadium steel with a 1:8 twist rate—perfect for stabilizing everything from 55-grain plinking rounds to 77-grain match loads.

• 16-inch chrome-moly vanadium steel barrel with 1:8 twist and Melonite finish for corrosion resistance and accuracy
• Free-float M-LOK handguard with full-length Picatinny top rail and M-LOK slots at 3, 6, and 9 o’clock
• Nickel-boron coated single-stage trigger and shot-peened, MPI-tested bolt carrier group

Who It’s For

The Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-LOK rail fills a sweet spot for three kinds of shooters. First, it is a strong candidate for the first-time AR buyer who wants a rifle that runs from the factory without tinkering. Second, it suits the seasoned shooter who appreciates upgraded parts like the nickel-boron trigger and free-float rail without paying a custom-build price. Third, it works well for the home defender or ranch owner who needs a reliable 5.56mm carbine that can mount a light, sling, and optic without adding a ton of weight. The mid-length gas system and H buffer keep the cycle smooth, and the M-LOK rail lets you position accessories exactly where you want them. This is a rifle that rewards practice and handles hard use.

• First-time AR buyers looking for a ready-to-run, factory-assembled rifle
• Experienced shooters who want upgraded components without paying a premium for a custom build
• Home defenders and property owners needing a reliable, modular carbine for varied conditions

Shipping & FFL

We ship the Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-LOK rail to your chosen Federal Firearms License (FFL) dealer. After you place your order, we will need your selected FFL to send us a copy of their license. You can either have your dealer email it to our FFL team or upload it during checkout. We ship within one to two business days via a contracted carrier that requires an adult signature upon delivery. Please verify that your local laws allow the purchase of this rifle before ordering. Once the rifle arrives at your FFL, you will complete the standard ATF Form 4473 and any applicable state background check. We cannot ship to PO boxes, and we do not ship rifles to non-FFL addresses. If you have questions about the transfer process, our customer service team is ready to help.

• Rifle ships to your chosen FFL dealer only—no direct-to-home delivery
• Your FFL must provide a valid copy of their license before we ship
• Adult signature required upon delivery; check local laws before ordering