Cross Machine Tool Ultra Precision Stripped AR-15 Upper Receiver
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Cross Machine Tool
Overview
The Cross Machine Tool Ultra Precision Stripped AR-15 Upper Receiver is designed for builders seeking a solid foundation for their custom rifle. Made from billet aluminum, this A4-style upper receiver offers precision machining that ensures a tight fit with your lower and enhances overall build integrity. This receiver is commonly used in precision-focused builds, where accuracy and reliability are paramount.
Specifications
Build history on GunPartPicker
Builders on GunPartPicker first added the Cross Machine Tool Ultra Precision Stripped AR-15 Upper Receiver to a build in August 2026.
It was hard to find in September 2026, in stock on only 2 of the 28 days we checked, and today only Primary Arms has it in stock. Prices barely moved in September 2026, holding around $198, so there haven't been real sales lately. Buying today, the lowest price is $198 at Primary Arms, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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