Daniel Defense MK18 10.3" Upper Receiver 5.56 1-7 Govt Black
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Daniel Defense
Overview
The Daniel Defense Mk18 10.3" Upper Receiver is a stripped upper designed for AR-15 builds, featuring a 10.3-inch barrel optimized for 5.56 NATO ammunition. With a government contour and a 1:7 twist rate, it provides stability and accuracy, making it suitable for a variety of shooting applications. This upper receiver is often found in builds that utilize a carbine gas system, making it a reliable choice for those looking to create a compact and effective firearm.
Specifications
Daniel Defense MK18 10.3" Upper Receiver 5.56 1-7 Govt Black
Available Merchants(1)
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Build history on GunPartPicker
Builders have been adding the Daniel Defense MK18 10.3" Upper Receiver 5.56 1-7 Govt Black to their builds on GunPartPicker since February 2026. All time, it ranks #244 of the 1,705 upper receivers builders have added. Builds with this upper receiver are nearly all chambered in 5.56 NATO, split between carbine-length (50%) and rifle-length (50%) gas systems, and nearly all AR-15.
Today the one retailer we track is out of stock. Listed prices start at $1,454 at BattleHawk Armory for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
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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.
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