Knights Armament AR-15 Upper Receiver Carbine Mod 2 14.5" Urx 4 M-LOK
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Knights Armament
Overview
The Knights Armament AR-15 Upper Receiver Carbine Mod 2 features a stripped assembly designed for builders looking to create a lightweight yet robust upper. With a barrel length of 14.5 inches and a carbine gas system, this upper is optimized for 5.56 NATO caliber ammunition, offering a twist rate of 1:7 that enhances stability and accuracy with a wide range of bullet weights. This upper receiver commonly appears in builds that prioritize maneuverability and versatility, making it ideal for tactical applications or lightweight setups.
Specifications
Knights Armament AR-15 Upper Receiver Carbine Mod 2 14.5" Urx 4 M-LOK
Build history on GunPartPicker
Builders have been adding the Knights Armament AR-15 Upper Receiver Carbine Mod 2 14.5" Urx 4 M-LOK to their builds on GunPartPicker since February 2026. All time, it ranks #243 of the 1,578 upper receivers builders have added. 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 out of stock everywhere we track for all of August 2026, and today none of the 2 retailers we track has it in stock right now. Listed prices start at $1,989.16 at Brownells for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
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Frequently Built With
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