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Cross Machine Tool
Overview
The Cross Machine Tool Upur-1a Billet AR-15 Upper Receiver is a stripped upper designed specifically for the .458 SOCOM caliber, offering a solid base for your custom builds. Crafted from billet aluminum, it provides enhanced durability while maintaining precise tolerances essential for reliable performance. This upper receiver is commonly found in builds that prioritize heavy-hitting rounds for hunting or tactical applications.
Cross Machine Tool Upur-1A Billet AR-15 Upper Receiver - 458 Socom
Prices checked
The Cross Machine Tool Upur-1A Billet AR-15 Upper Receiver - 458 Socom was out of stock everywhere we track for all of September 2026, and today the one retailer we track is out of stock. Listed prices start at $210.99 at Brownells for when it comes back.
Prices checked · refreshed daily across 37 retailers
We ranked every upper receiver by how often it shows up in real builds on GunPartPicker.
Read the guide: Most Popular AR-15 Upper Receivers →Check it against the live catalog:
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