If you want to shoot heavier loads in your AR-15, the usual 1:7-twist-rate barrel simply won’t do. This rifle kit features a 16″ 416R stainless barrel with a 1:8 twist rate, making it more sell-suited for handling heavier grain cartridges.
The 416R steel we chose for this barrel offers the smoothest, most consistent rifling out of any gun maker’s factory. You’ll hit sub-MOA groups with factory loads at 100 yards – if you’re good enough to take full advantage of this kit, that is.
The lightweight M-Lok handguard comes with plenty of space for your foregrip, tac-light, and whatever other accessories have a place on your rifle. And it’s free-float, so it won’t kill your accuracy. A carbine-length gas system reduces felt recoil and ensures faster follow-up shots. Plus, the upper assembly is pre-built and measured to spec, ensuring your rifle kit’s ready to fire out of the box, no adjustments needed. …after you put it together. So, what are you waiting for?!
AR 15 Rifle Kit Specs:
Gas System: Carbine-length
Barrel Profile: M4
Barrel Steel: 416R
Barrel Finish: Stainless steel
Chrome Lining: No
Muzzle Thread: 1/2×28
Chamber: .223 Wylde (accepts both .223 and 5.56mm)
Twist Rate: 1:8
Barrel Extension: M4
Gas Block Size: .750″
Gas Block Type: Low-profile
Muzzle Device: A2 Flash hider
Receiver Material: Forged 7075 T6
Receiver Type: M4
Handguard Type: 13.5″ lightweight M-Lok free float
Bolt Carrier Group Included: Yes
Bolt Steel: 9310 steel, magnetic particle inspected
Bolt Carrier Profile: Full-auto
Charging Handle Included: Yes
Overall Length: 24.5″
Benefits of the 16” Carbine-Length SS AR 15 Rifle Kit:
- 100% legal to own and ship to your front door
- Not considered a firearm – no FFL paperwork needed!
- 416R stainless barrel and Freedom parts kit ensure sub-MOA accuracy
- Prebuilt upper with gas system removes the guesswork of rifle making
- Includes bolt carrier group, free-floated M-Lok handguard and lower parts kit
AR 15 Rifle Kit Details (Expanded):
Barrel: 16″ carbine-length stainless steel, chambered in .223 Wylde, 1:8 twist rate, .750″ low-profile gas block, 13.5″ free-float M-Lok handguard, with an A2 “birdcage” flash hider.
Upper Receiver Assembly: Forged from 7075 T6 aluminum, hard-coat anodized in black for durability, features M4 feed ramps, and are made in the USA.
Bolt Carrier Group: The bolt carrier is made from 9310 steel and has a staked gas key and black nitride finish. The bolt itself comes complete with an extractor spring and O-ring insert. It accepts .223 Wylde, 5.56mm, and .300BLK calibers (though you should NEVER attempt to use a caliber for which your rifle is not chambered), and is magnetic particle inspected.
80% Lower Receiver: Choose to receive a forged or billet Fire/Safe 80% lower receiver. Our lower receivers are anodized to match the upper receiver perfectly. and they come ready for machining of the trigger pocket and drilling of the safety selector and trigger pin holes.
AR-15 Lower Parts Kit: includes all parts needed to complete the lower receiver including pistol grip, mil-spec safety selector, and trigger/fire control group.
Lower Assembly: comes with complete buffer tube assembly including buffer, buffer spring, six-position buffer tube, latch plate, castle nut, and butt stock based on original Colt design.
Charging Handle: standard size, made from 6061 aluminum.
Please note: This build kit requires that the builder complete the 80% lower receiver themselves, but that’s the rewarding part of the experience (and the only way to build your own AR-15 without the need of an FFL transfer or serialization).
Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or “assault weapons” (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily
80-Lower.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.