Daniel Defense MK12 SPR URG 5.56mm 18 Upper Receiver Group
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Daniel Defense
Overview
The Daniel Defense MK12 SPR URG is a complete upper receiver group designed for the AR-15 platform, featuring an 18-inch barrel chambered in 5.56 NATO. Its rifle-length gas system enhances reliability and accuracy, making it suitable for precision shooting applications. This upper receiver is commonly used in designated marksman builds, where accuracy and effective range are paramount.
Specifications
Daniel Defense MK12 SPR URG 5.56mm 18 Upper Receiver Group
Available Merchants(5)
Prices checked
Price Alert
October 2026 on GunPartPicker
Daniel Defense MK12 SPR URG 5.56mm 18 Upper Receiver Group ranked #232 of the 844 upper receivers builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it ranks #232 of the 2,025 upper receivers builders have added. Builds with this upper receiver are nearly all chambered in 5.56 NATO, nearly all on rifle-length gas, and nearly all AR-15.
It was in stock most times we checked in October 2026, and today 4 of the 5 retailers we track have it in stock. Buying today, the lowest price is $1,632 at Palmetto State Armory, which matches the best price we saw in October.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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