Bear Creek Arsenal | 300 B/O Upper | 7.5″ Barrel | 1:7 Twist

The Bear Creek Arsenal 300 B/O Complete Upper is listed as a factory-configured AR-15 upper assembly that provides a compact barrel and a pistol-length gas system. The listing identifies a 7.5-inch barrel and a 1:7 twist rate and notes M-LOK compatibility for the handguard. This upper is intended for short-barrel or pistol-style AR builds and is appropriate for short-range practical shooting and legal short-range hunting where applicable.

Product Specifications

• The manufacturer is Bear Creek Arsenal.
• This listing is for a complete upper assembly for the AR-15 platform.
• The model designation from the listing is 300 B/O COMPLETE UPPER 7.5″ BRL 1:7 TWIST PISTOL LENGTH GAS MLOK.
• The caliber is listed as 300 B/O.
• The barrel length is 7.5 inches.
• The twist rate is 1:7.
• The gas system is specified as pistol-length gas.
• The handguard interface is M-LOK.
• The product category is AR15 Uppers.
• The UPC is 756542288061.
• The listing image URL is provided by the retailer; see product images for details.

This upper assembles a compact-barrel AR configuration with features that prioritize short overall length and modular accessory options via M-LOK. The 1:7 twist and 7.5-inch barrel reflect the dimensions shown in the listing and make the unit suitable for tight-handling builds and short-range applications. If you need a short-barrel AR upper that matches the listed parameters, this Bear Creek Arsenal complete upper is specified for that role.