16″ OD Green Unassembled Upper Build Kit – 15″ Keymod
$204.95
Unassembled 16″ 5.56 NATO AR rifle upper build kit in OD Green Cerakote. 15″ KeyMod free-float handguard, 4150 phosphate barrel with 1:7 twist, carbine-length gas system. BCG and charging handle not included. SKU DT11-213.
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- FAQ Unassembled Upper Kit
A 16″ 5.56 NATO unassembled AR rifle upper build kit with a 15″ KeyMod free-float handguard in OD Green Cerakote. The 15″ KeyMod handguard gives you a near full-barrel-length free-float rail with KeyMod slots at the 3, 6, and 9 o’clock positions — attach only what you need, where you need it, without committing to a full Picatinny rail setup. Carbine-length gas system, 1:7 RH twist, and matching OD Green Cerakote on both receiver and handguard.
Barrel
- Caliber: 5.56 NATO / .223 Wylde compatible
- Length: 16″
- Material: 4150 Chrome Moly Vanadium
- Finish: Manganese phosphate
- Profile: M4 contour
- Gas system: Carbine-length
- Twist rate: 1:7 RH
- Muzzle thread: 1/2×28 TPI
- Gas block journal: .750″
Upper Receiver
- Material: Forged 7075-T6 aluminum
- Finish: Cerakote OD Green
- Feed ramps: M4
- Made in the USA
Handguard
- Length: 15″ KeyMod free-float
- Material: 6061-T6 aluminum
- Finish: Cerakote OD Green
- Accepts KeyMod accessories and rail sections at 3, 6, and 9 o’clock positions
This kit includes: OD Green Cerakote 15″ KeyMod handguard with barrel nut and mounting screws, upper receiver, 16″ barrel, forward assist assembly, dust cover assembly, gas block with pin, gas tube, A2 flash hider with crush washer.
Note: BCG and charging handle are not included. Ships unassembled. SKU: DT11-213.
| Weight | 5 lbs |
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What’s the difference between the OD Green M-LOK and KeyMod versions of this kit?
The only difference is the handguard mounting system. M-LOK uses a slotted interface that has become the more widely adopted current standard, with the broadest accessory selection from most manufacturers. KeyMod uses a keyhole-shaped slot system that was popular before M-LOK gained dominance — it still has a solid accessory ecosystem and works equally well. If you already own accessories in one format, stick with that. If you’re starting fresh, M-LOK gives you more options going forward, but KeyMod is not a limiting choice by any means.
Can I add Picatinny rail sections to specific positions on this KeyMod handguard?
Yes. Short KeyMod-to-Picatinny rail adapters are available from multiple manufacturers and attach directly to the KeyMod slots. You can add a 2″, 3″, or 4″ Picatinny section at any position — 3, 6, or 9 o’clock — to mount accessories that don’t have native KeyMod attachment. This lets you run KeyMod-native accessories where you have them and bridge to Picatinny where needed, without converting the entire handguard.
Does this kit ship with a gas block already installed on the barrel?
No — the components ship unassembled. The gas block, gas tube, barrel, upper receiver, and handguard are separate. Assembly requires installing the gas block on the barrel, threading the gas tube from the gas block through the upper receiver, then installing the handguard over the barrel. A barrel nut wrench, torque wrench, upper receiver vise block, and punch set are the primary tools needed.
What lower receiver pairs well with a 16″ rifle upper?
Any mil-spec AR-15 lower receiver will mate with this upper. For a 16″ rifle build, a standard carbine buffer tube, carbine buffer, and carbine spring are the typical lower components. If you’re going with a fixed stock, a rifle-length buffer tube is another option. The upper is machined to mil-spec dimensions with no proprietary fitment — it will drop onto any standard lower without modification.
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