Daniel Defense MK18 RIS III 10.3" 5.56 NATO Complete Upper Receiver - FDE
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Daniel Defense
Overview
The Daniel Defense MK18 RIS III complete upper receiver features a 10.3-inch barrel chambered in 5.56 NATO, making it an ideal choice for compact builds that require maneuverability without sacrificing performance. This upper is designed for the AR-15 platform and comes fully assembled, allowing builders to easily integrate it into their projects. Typically, you'll find this upper receiver in builds focused on tactical applications and close-quarters engagements.
Specifications
Daniel Defense MK18 RIS III 10.3" 5.56 NATO Complete Upper Receiver - FDE
Available Merchants(5)
Prices checked
Price Alert
September 2026 on GunPartPicker
Daniel Defense MK18 RIS III 10.3" 5.56 NATO Complete Upper Receiver - FDE ranked #117 of the 615 upper receivers builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #283 of the 1,682 upper receivers builders have added.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today 4 of the 5 retailers we track have it in stock. Prices barely moved in September 2026, holding around $1,454, so there haven't been real sales lately. Buying today, the lowest price is $1,454 at BattleHawk Armory, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by the builds that include this one
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Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
EOTECH XPS2 Holographic Sight, Tan - XPS2-0TAN
Radian Raptor Charging Handle & Talon Safety Selector Combo - OD Green
B5 Systems AR-15 Enhanced SOPMOD Stock Collapsible Mil-Spec Black
Cryptic Coatings 5.56 NATO AR-15 Bolt Carrier Group - Mystic Bronze
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all 1 →Builds in the community that include the Daniel Defense MK18 RIS III 10.3" 5.56 NATO Complete Upper Receiver - FDE
| Build | Parts | Total |
|---|---|---|
 | 15 | $3518.96 |
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