Knights Armament AR-15 Upper Receiver Mod 2 16" Urx 4 M-LOK
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Knights Armament
Overview
The Knights Armament AR-15 Upper Receiver Mod 2 16" Urx 4 M-LOK is a upper receiver. Compare prices from multiple merchants and find the best deal.
Specifications
Build history on GunPartPicker
Builders have been adding the Knights Armament AR-15 Upper Receiver Mod 2 16" Urx 4 M-LOK to their builds on GunPartPicker since February 2026. All time, it ranks #899 of the 1,634 upper receivers builders have added. Builds with this upper receiver are nearly all chambered in 5.56 NATO, split between mid-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 $1,918.62 at Brownells for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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Frequently Built With
The part most often added in each category by the 13 builds that include this one
Knights Armament Sr-15 Iws Lower Receiver Complete
Magpul AFG-2 Angled Fore Grip - Black
Geissele Automatics Reliability Enhancement KIT H1
SF SOCOM556-RC4-BK SUPPRESSOR G4 5.56 Black
Magpul AR-15 MOE Stock Collapsible Mil-Spec Black
Geissele Super Charging Handle (SCH), 7.62, Desert Dirt Color 05-476S
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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