Mk18 RIII 5.56x45mm 10.3"bbl Stripped Upper W/9.5" Handguard

Name: Mk18 RIII 5.56x45mm 10.3"bbl Stripped Upper W/9.5" Handguard
Brand: Daniel Defense
Availability: InStock

Daniel Defense · Upper Receiver

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Best price

$899.99at Brownells

In stock checked Sep 27, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$899.99checked Sep 27, 2026	In stock	Buy at Brownells

Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.

Price history

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Lowest in-stock price in the last 30 days: $899.99 at Brownells. Dashed line = out of stock. Tracking since Sep 27, 2026.

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Store	Latest	Lowest	Highest
Brownells	—	$899.99	$899.99

Since Sep 27, 2026.

About this part

The Mk18 RIII 5.56x45mm 10.3"bbl Stripped Upper W/9.5" Handguard is an AR-15 stripped upper receiver from Daniel Defense. One store lists it, Brownells at $899.99. The lowest in-stock price in the last 30 days was $899.99 at Brownells.

Fits and works with

Caliber: 5.56 / .223 · Shop matching ammo
Bolt: Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Barrel length: 10.3" · Handguards
Handguard length: 9.5" · Barrels

Specifications

Manufacturer: Daniel Defense
Type: Stripped
Platform: AR-15
Caliber: 5.56 mm NATO
Barrel length: 10.3"

From the manufacturer

Adding to their extremely successful line of stripped MK18 Daniel Defense uppers, Daniel Defense now has the stripped MK18 upper with their RIII rail! The MK18 RIII(TM) AR15 style Upper Receiver Group is unmatched in size, weight, and performance, and is built around a 10.3 inch Cold Hammer Forged M4 Profile barrel and a carbine length gas system. It features a 9.5 inch lightweight RIS III rail-modeled after the revolutionary RIS II two-piece handguard developed for SOCOM- which features M-LOK attachment for lighter weight. UPPER RECEIVER: Mil-Spec with Indexing Marks and M4 Feed Ramps. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized BARREL: Chro Mfg: Daniel Defense