Cross Machine Tool Upur-4 Billet AR-15 Upper Receiver - Slick Side
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Overview
The Cross Machine Tool Upur-4 Billet AR-15 Upper Receiver is a stripped slick side upper designed for builders looking for a clean and streamlined aesthetic. Made from billet aluminum, this upper offers a solid foundation for your AR-15 platform, ensuring durability and precision in your assembly. It's particularly popular among multi-caliber builds, providing versatility for various shooting applications.
Specifications
Cross Machine Tool Upur-4 Billet AR-15 Upper Receiver - Slick Side
Available Merchants(1)
Prices checked
Stock Alert
Build history on GunPartPicker
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, but today the one retailer we track is out of stock. Prices barely moved in October 2026, holding around $140, with no real sale all month. Listed prices start at $140 at Primary Arms for when it comes back.
Prices checked · refreshed daily across 37 retailers
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Read the guide: Most Popular AR-15 Upper Receivers →Check it against the live catalog:
Frequently Built With
The part most often added in each category by the builds that include this one
BLEM PSA AR15 Complete Classic Stealth Lower, Black
Ballistic Advantage 14.5" .300 Blackout Pistol Length Barrel, Modern Series
Midwest Industries Suppressor Series M-LOK AR-15 Handguard - 10.5"
Radian Weapons AR-15 Raptor SD-SL Ambidextrous Charging Handle Black
Strike Industries AR-15 Gas Tube - Pistol Length
Bravo Company M16 Bolt Carrier Group Black
Builds Featuring This Part
See all builds →Builds in the community that include the Cross Machine Tool Upur-4 Billet Ar-15 Upper Receiver - Slick Side
| Build | Parts | Total |
|---|---|---|
 | 14 | $2481.65 |
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