Cross Machine Tool UPUR-3 Big Bore Billet AR-15 Upper Receiver - Slick Side No Dust Cover
Click to see full view
Overview
The Cross Machine Tool UPUR-3 Big Bore Billet AR-15 Upper Receiver - Slick Side No Dust Cover is a upper receiver. Compare prices from multiple merchants and find the best deal.
Specifications
Cross Machine Tool UPUR-3 Big Bore Billet AR-15 Upper Receiver - Slick Side No Dust Cover
August 2026 on GunPartPicker
Cross Machine Tool UPUR-3 Big Bore Billet AR-15 Upper Receiver - Slick Side No Dust Cover ranked #291 of the 690 upper receivers builders added on GunPartPicker in August 2026.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today both retailers we track have it in stock. Prices barely moved in August 2026, holding around $131, so there haven't been real sales lately. Buying today, the lowest price is $131 at AR15 Discounts, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
Not sure which upper receiver to pick?
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:
Frequently Built With
Popular alongside upper receivers on GunPartPicker
Aero Precision M4E1 Complete Lower Receiver W/MOE SL Grip & SL-S Carbine Stock
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers
Bravo Company M16 Bolt Carrier Group Black
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Magpul AFG-2 Angled Fore Grip - Black
Magpul AR-15 MOE Stock Collapsible Mil-Spec Black
No reviews yet. Be the first to review this product!