Cross Machine Tool UPUR-3A Billet AR-15 Side Charging Upper Receiver - Slick Side - .458 SOCOM Compatible
- Machined from billet 7075-T6 aluminum
- Hardcoat anodized
- Engraved T-marks and 1913 picatinny rail
- Increased wall thickness
- Precision cut carrier bore diameter
- .458 SOCOM sized ejection port
- No forward assist, shell deflector, or dust cover
- Compatible with Bear Creek Arsenal and Young Mfg. side charging BCGs
- Dual charging capabilities with standard charging handle
- M4 feed ramps
- Compatible with Mil-Spec lowers and parts
Cross Machine Tool Co., utilizing the latest machining technologies, offers high quality products that you’ll be excited to own. Cross Machine Tool is a veteran owned business that takes pride in manufacturing products you will own. CMT products exceed military standards, so you can build the best AR style rifle possible.
Ratings & Reviews
Best side-charge upper on the market.
by Templeton Peck
Like all CMT stuff, it's great quality and matches up tight with ever lower I have. While other side-charge receivers I tried were thick and heavy, the CMT is much closer in weight and dimensions of standard mil-spec uppers. That's important because many others on the market won't let you use handguards that have alignment tabs. This one does.