MK16 Urg-I Complete Upper Receivers 5.56mm - MK16 11.5'''' URGI Upper CHF Barrel, Ach, Rebcg 5.56mm Ddc
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Geissele
Overview
The Geissele Automatics Mk16 Urg-I Complete Upper Receiver is designed for the AR-15 platform, featuring an 11.5-inch barrel chambered in 5.56 NATO. This complete assembly incorporates a carbine-length gas system, making it suitable for a variety of applications while maintaining reliable cycling and performance. Builders often choose this upper for compact builds that prioritize maneuverability without sacrificing firepower.
Specifications
MK16 Urg-I Complete Upper Receivers 5.56mm - MK16 11.5'''' URGI Upper CHF Barrel, Ach, Rebcg 5.56mm Ddc
August 2026 on GunPartPicker
Geissele MK16 Urg-I Complete Upper Receivers 5.56mm - MK16 11.5'''' URGI Upper CHF Barrel, Ach, Rebcg 5.56mm Ddc ranked #31 of the 690 upper receivers builders added on GunPartPicker in August 2026, behind the PSA 10.5" Pistol Length 300AAC Blackout 1:8 Nitride 9" Lightweight M-LOK Freedom Upper With BCG & CH, with about 1 in every 250 upper receivers added to builds. Up from #39 in July. Builds with this upper receiver are nearly all chambered in 5.56 NATO, nearly all on carbine-length gas, and nearly all AR-15.
It was hard to find in August 2026, in stock on only 10 of the 25 days we checked, and today only Palmetto State Armory has it in stock. It dipped to $1,191.41 at Brownells for a stretch in August 2026, well under its usual $1,478.96 to $1,525, so sales do come around. Buying today, the lowest price is $1,479.99 at Palmetto State Armory, above August's low of $1,191.41, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
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