MK16 Urg-I Complete Upper Receivers 5.56mm - MK16 14.5'''' URGI Upper CHF Barrel, Ach, Rebcg 5.56mm Ddc

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Geissele

Overview

The Geissele Mk16 Urg-I Complete Upper Receiver is a fully assembled upper designed for the AR-15 platform, featuring a 14.5-inch barrel chambered in 5.56 NATO. This complete upper includes critical components like the ACH and REBCG, ensuring reliable performance and compatibility with a wide range of lower receivers. Builders often incorporate this upper in 5.56 NATO caliber builds, making it a versatile choice for various applications.

Specifications

MPN08-159S

AssemblyComplete

PlatformAR-15

ColorFDE

Caliber5.56 NATO

Barrel Length14.5

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MK16 Urg-I Complete Upper Receivers 5.56mm - MK16 14.5'''' URGI Upper CHF Barrel, Ach, Rebcg 5.56mm Ddc

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August 2026 on GunPartPicker

Geissele MK16 Urg-I Complete Upper Receivers 5.56mm - MK16 14.5'''' URGI Upper CHF Barrel, Ach, Rebcg 5.56mm Ddc ranked #168 of the 690 upper receivers builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #375 of the 1,642 upper receivers builders have added. Builds with this upper receiver are nearly all chambered in 5.56 NATO and nearly all AR-15.

It was out of stock everywhere we track for all of August 2026.

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Updated Sep 30, 2026 · from real builds on GunPartPicker · Prices checked Sep 30, 2026 · refreshed daily across 35 retailers