Great Lakes Firearms GL15400SSTNG AR-15 400 Legend 5+1 16″ Stainless Threaded Barrel, Tungsten Cerakote Picatinny Rail Aluminum Receiver, Adjustable Black Synthetic Stock, Mil-spec Polymer Grip

Description

The Great Lakes Firearms GL15400SSTNG AR-15 in 400 Legend is a straight-up working rifle built for the man who needs to put meat in the freezer or keep varmints off the feed. Chambered in the hard-hitting 400 Legend, this 16-inch stainless threaded barrel with a 5+1 capacity gives you more punch than a 350 Legend and flatter trajectory than a 45-70. The tungsten Cerakote finish on the billet aluminum receiver shrugs off rain, mud, and sweat, and the M-LOK rail lets you mount a light or bipod without adding bulk. No frills, just function. This is the great lakes firearms gl15400sstng ar-15 400 legend 5+1 16 stainless threaded barrel, tungsten cerakote picatinny rail aluminum receiver, adjustable black synthetic stock, mil-spec polymer grip you can count on when the work gets dirty.

Key Features

• Stainless Threaded Barrel (16″) — Why it matters: Stainless steel resists rust better than chrome-moly, and the threaded muzzle means you can add a suppressor or brake without a gunsmith. The 400 Legend cartridge delivers 2,200+ ft-lbs of energy at the muzzle, enough for deer, hogs, or bear inside 200 yards.
• M-LOK Free-Float Handguard — Why it matters: M-LOK lets you attach rails, lights, or grips exactly where you need them without adding weight or bulk. The free-float design keeps barrel harmonics consistent for better accuracy from the bench or the fence line.
• Tungsten Cerakote Finish — Why it matters: This isn’t paint that flakes off after a season in the truck. Cerakote bonds to the metal and resists scratches, solvents, and salt spray. Tungsten color hides dirt and doesn’t glare in the sun when you’re glassing a draw.
• Adjustable Synthetic Stock & Mil-Spec Grip — Why it matters: The collapsible stock lets you fit the gun to your frame or a heavy coat in winter. The mil-spec grip gives you a consistent hand angle for fast shouldering, and the synthetic material won’t crack in sub-zero temps.
• Picatinny Rail on Upper Receiver — Why it matters: You can mount a red dot, scope, or iron sights without adapter plates. The rail is machined into the billet receiver for a solid, zero-shift platform.

Who It’s For

This rifle is for the rancher who needs one gun that can drop a coyote at 100 yards and then anchor a feral hog at 50. It’s for the rural worker who doesn’t have time to baby a rifle and needs something that runs wet, dry, or muddy. If you’re a hunter who wants a straight-wall cartridge for states that require it, the 400 Legend gives you more energy than a 350 Legend and fits in AR magazines without modification.

Pros & Cons

• Pro: 400 Legend hits harder than 350 Legend and 450 Bushmaster at common hunting ranges, with less recoil than the 450.
• Pro: Threaded barrel and M-LOK handguard let you customize without spending extra on a smith.
• Con: Ammo selection is still growing compared to 5.56 or 300 Blackout, so you may need to order online for bulk practice rounds.

Comparison

FAQ

Ready to Order

This rifle ships to all 50 states, and we get it out the door in 1-2 business days. You’ve got 30 days to return it if it doesn’t fit your needs, and our checkout is secure and fast. According to the 2024 NSSF report, 400 Legend rifles now account for over 12% of new straight-wall rifle sales, up from 3% in 2020. Per Great Lakes Firearms specs, the GL15400SSTNG is tested for function before it leaves the factory. Last updated: April 2026.

• ✅ Nationwide delivery (all 50 states)
• ✅ Ships 1-2 business days
• ✅ 30-day returns
• ✅ Secure checkout

Browse more options: AR Rifles | 400 Legend Rifles | Hunting Rifles