16″ Unassembled Upper Build Kit – 12″ M-lok
$194.95
Unassembled 16″ 5.56 NATO AR rifle upper build kit in black anodized finish. Includes 12″ M-LOK free-float handguard, 4150 phosphate barrel with 1:7 twist, carbine-length gas system, gas block, gas tube, A2 flash hider, and crush washer. BCG and charging handle not included. SKU DT11-208.
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- FAQ Unassembled Upper Kit
This 16″ 5.56 NATO unassembled AR rifle upper build kit pairs a 4150 CMV barrel with a 12″ M-LOK free-float handguard on a carbine-length gas system, finished in Type III hard coat anodized black. The barrel runs a 1:7 RH twist with a manganese phosphate finish, 1/2×28 muzzle thread, and a .750″ gas block journal. Round out the build with an Anderson AR-15 complete bolt carrier group, or browse more AR-15 upper build kits in this lineup.
- Caliber: 5.56 NATO / .223 Wylde compatible
- Barrel: 16″, 4150 CMV, manganese phosphate finish, M4 contour, 1:7 RH twist, 1/2×28 TPI, .750″ gas block journal, carbine-length gas
- Upper receiver: Forged 7075-T6, M4 feed ramps, Type III hard coat anodized black
- Handguard: 12″ M-LOK free-float, 6061-T6 aluminum, Type III hard coat anodized black
- What’s included: Upper receiver, 16″ barrel, handguard with barrel nut and mounting screws, forward assist assembly, dust cover assembly, gas block with pin, gas tube, A2 flash hider with crush washer
- Note: BCG and charging handle not included, available as an add-on. Ships unassembled.
- SKU: DT11-208
| Weight | 5 lbs |
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Does this kit include everything needed to complete the upper receiver?
Almost everything. The kit includes the barrel, upper receiver with dust cover and forward assist assemblies, 12″ M-LOK handguard with barrel nut, carbine-length gas tube, low-profile gas block, A2 flash hider, and crush washer. The two things not included are the bolt carrier group (BCG) and charging handle — you’ll need to source those separately. Once you have a BCG and charging handle, the upper is complete and ready to drop onto a lower receiver.
Can I swap the A2 flash hider for a different muzzle device?
Yes. The 1/2×28 muzzle thread on this barrel accepts any standard 5.56/.223 muzzle device. If you prefer a muzzle brake, linear compensator, or suppressor mount over the included A2 flash hider, simply swap it out during assembly before or after the handguard goes on. Use a new crush washer (included) to properly time and secure the device to spec. The A2 flash hider is included as a functional default — it’s not permanently installed.
What is the difference between the 12″ and 15″ handguard versions on a 16″ barrel?
A 12″ handguard on a 16″ barrel leaves about 4″ of barrel exposed past the muzzle end of the handguard, which gives you more clearance for muzzle devices and a slightly lighter setup. A 15″ handguard leaves only about 1″ of barrel exposed, providing near full-length coverage and maximum accessory real estate. The 12″ is a more traditional carbine configuration — versatile and practical. The 15″ is preferred for builds where you want a longer forward grip position, a competition-style profile, or a cleaner look with a suppressor.
What lower receiver and buffer setup pairs with this 16″ upper?
Any mil-spec AR-15 lower receiver will work with this upper. For a standard 16″ carbine build, pair it with a carbine buffer tube, standard carbine buffer (3 oz), and carbine spring. If you’re running a fixed stock, a rifle-length buffer tube is an option. The upper is machined to mil-spec dimensions — no proprietary lower or buffer system is required.
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