Panzer Arms BP12 G3 12 Gauge, 18.5-inch, 5+1, Alpine White, Semi-Auto Bullpup Shotgun The Panzer Arms BP12 G3 in Alpine White brings a distinctive color choice to a compact, gas-operated semi-automatic bullpup shotgun. The 18.5-inch barrel sits within a 28.5-inch overall profile, and the 3-inch chamber pairs with a 5+1 capacity. A 7075-T6 aluminum upper assembly and high-impact polymer lower support the updated Gen 3 design. The BP12 G3 includes one five-round magazine, front and rear flip-up sights, a cylinder choke and a manual. Its soft adjustable cheek riser, 15-degree soft-rubber grip and ambidextrous control features bring practical comfort details to the compact layout. Explore the Panzer Arms BP12 G3 in Alpine White at BattleHawk Armory. Compare the complete specifications and select the color that fits your preferences. 18.5-Inch Barrel in a 28.5-Inch Bullpup Profile The BP12 G3 uses a bullpup layout, with the action positioned behind the trigger. That arrangement accommodates the 18.5-inch barrel in an overall length of 28.5 inches. The result is a short external profile that is a defining feature of the BP12 family. Overall weight is 7.7 pounds. The 12-gauge chamber measures 3 inches. Capacity is 5+1: five rounds in the included magazine and one in the chamber. The barrel length, chamber dimensions and magazine capacity are consistent across the four color choices. Gen 3 Gas System and Receiver Construction The Gen 3 configuration features an updated gas-operated semi-automatic action. Its upper receiver assembly is made from 7075-T6 aluminum and incorporates M-LOK slots plus a full M1913 Picatinny rail with T-marks. The lower receiver assembly uses high-impact polymer. M-LOK slots and the Picatinny rail provide mounting interfaces for compatible accessories. The rail's T-marks identify individual mounting positions, making them easier to reference. The full-length rail and included flip-up sights give the BP12 G3 a defined sighting arrangement. Consult the chamber markings and included manual for ammunition suitability. Ambidextrous Features and Soft-Touch Ergonomics The BP12 G3 has an ambidextrous safety, charging handle and bolt release, along with an integral ambidextrous quick-detach (QD) mount. The controls provide access from either side, while the QD mount provides a connection point for a compatible sling attachment. The soft-touch cheek riser is adjustable, providing a choice of cheek height for a more comfortable fit. A soft-rubber AR-type grip uses a 15-degree angle and supports AR-15-type grips. This familiar interface provides flexibility in grip selection. The supplied grip combines the new angle with a soft-rubber contact surface. Alpine White Configuration Alpine White is the bright color option in the BP12 G3 lineup. It provides a different visual character from the black, grey and earth-tone variants without changing the action, magazine capacity or dimensions. The adjustable soft-touch cheek riser and soft-rubber grip are included with this color as well. Included Equipment One five-round magazine Front and rear flip-up sights One cylinder choke Manual Product Specifications Manufacturer: Panzer Arms Model: BP12 G3 / Gen 3 Manufacturer part number: PABP12BPSAW UPC: 869325001501 Color: Alpine White Type: Bullpup shotgun Gauge: 12 gauge Action: Gas-operated semi-automatic Chamber length: 3 inches Barrel length: 18.5 inches Overall length: 28.5 inches Weight: 7.7 pounds Capacity: 5+1 Magazine included: One five-round magazine Upper receiver assembly: 7075-T6 aluminum with M-LOK slots Rail: Full M1913 Picatinny rail with T-marks Lower receiver assembly: High-impact polymer Safety, charging handle and bolt release: Ambidextrous QD mount: Integral and ambidextrous Grip: AR-type soft rubber, 15-degree angle; AR-15-type grip interface Cheek riser: Adjustable soft touch Sights: Front and rear flip-up Included choke: Cylinder Frequently Asked Questions How many magazines are included with the BP12 G3? One five-round magazine is included. The stated 5+1 capacity combines five rounds in the magazine with one in the chamber. What are the barrel and overall lengths? The barrel is 18.5 inches long, and the shotgun measures 28.5 inches overall. Does the BP12 G3 include sights and a choke? Yes. Front and rear flip-up sights and a cylinder choke are included, along with the magazine and manual. Is the cheek riser adjustable? Yes. The BP12 G3 has an adjustable soft-touch cheek riser and a soft-rubber 15-degree AR-type grip. Shop the Panzer Arms BP12 G3 Alpine White semi-automatic bullpup shotgun at BattleHawk Armory. Review the dimensions, included equipment and Gen 3 features, then choose your preferred configuration.