Windham Weaponry WA-15B .300 Blackout 10.5″ AR Pistol with SBA3 Brace

Description Table of Contents Toggle Key SpecificationsWhat’s in the BoxWindham Weaponry WA-15B .300 Blackout — Key SpecificationsPerformance & ReliabilityIntended Use & ApplicationsWhy Buy From CaliperDepot? Key Specifications Caliber/Gauge: 300 AAC Blackout Capacity: 30 1 Barrel Length: 10.5" Action: Semi-Auto Sights: No Sights What’s in the Box 1 × 30 rd. The Windham Weaponry WA-15B .300 Blackout 10.5″ AR Pistol with SBA3 Brace represents a carefully engineered platform built for shooters seeking compact firepower without sacrificing reliability or quality. This AR pistol combines the proven AR-15 platform with the devastating .300 Blackout cartridge, making it an exceptional choice for home defense, tactical training, and suppressed shooting. Windham Weaponry has established itself as a quality manufacturer of American-made firearms, and this model exemplifies their commitment to precision engineering and customer satisfaction. The 10.5″ barrel paired with the SBA3 brace creates a maneuverable platform that doesn’t compromise on sight radius or velocity. Windham Weaponry WA-15B .300 Blackout — Key Specifications Caliber: .300 Blackout (300 AAC Blackout) Barrel Length: 10.5 inches with 1:8 twist rate Overall Length: Approximately 26 inches with SBA3 brace fully extended Action: Direct Impingement semi-automatic Finish: Black anodized aluminum with Parkerized steel components Stabilizing Brace: SBA3 adjustable brace for wrist support and control Magazine Capacity: 30 rounds (accepts standard AR-15 magazines) Sights: Picatinny top rail for optic mounting; M-LOK handguard for accessory rails Trigger: Single-stage trigger optimized for control Handguard: Modular M-LOK compatible for maximum customization Gas System: Mid-length for reduced recoil impulse Weight: Approximately 5.5 to 6 pounds depending on configuration Performance & Reliability The Windham Weaponry WA-15B .300 Blackout delivers outstanding ballistic performance in a compact package. The 10.5″ barrel is optimized for the .300 Blackout cartridge, which inherently produces subsonic velocities with standard ammunition, making this platform ideal for suppressed fire. With proper ammunition selection, users can expect reliable cycling and minimal point-of-aim shift between supersonic and subsonic loads. The direct impingement system ensures dependable operation across a wide range of ammunition types, from budget-friendly to premium loads. Windham Weaponry’s reputation for precision manufacturing translates directly to the WA-15B’s performance on the range. The bolt carrier group features proper dimensions and hardening for consistent lock-up and reliability over thousands of rounds. Field testing shows the WA-15B maintains excellent accuracy potential with quality optics mounted to the picatinny rail. Users consistently report tight shot groups at defensive distances, with some achieving sub-MOA performance with handloaded ammunition. The .300 Blackout cartridge is specifically engineered for performance in short-barreled rifles and pistols, and the WA-15B takes full advantage of this design. The cartridge was developed to provide .30-caliber performance from short barrels without relying on high velocities. Suppressor-ready by design, the WA-15B excels when paired with quality suppressors, producing hearing-safe subsonic performance that makes it a favorite among tactical shooters and hunters alike. Intended Use & Applications The Windham Weaponry WA-15B .300 Blackout serves multiple roles for modern shooters. Home defense shooters appreciate the compact size, manageable recoil, and devastating terminal performance of the .300 Blackout cartridge. The 10.5″ barrel length provides superior maneuverability in confined spaces like hallways and rooms, while the SBA3 brace ensures positive control during rapid engagement. The picatinny rail system allows quick installation of weapon-mounted lights and red dot sights, creating a complete defensive platform ready for serious use. Tactical training enthusiasts and military/law enforcement personnel benefit from the WA-15B’s realistic operating characteristics and AR-15 platform familiarity. The rifle-length stock controls and ergonomics remain unchanged, reducing training time for operators transitioning from larger AR systems. Suppressed shooting applications represent one of the primary strengths of the WA-15B, with the .300 Blackout cartridge delivering subsonic performance that sounds like a .22 rifle when properly suppressed. Hunting applications, particularly for medium-sized game at closer ranges, represent another excellent use case for this platform. Sport shooters and long-range precision rifle competitors appreciate the customization options available through the M-LOK handguard and complete picatinny rail system. The AR Pistol platform offers shooters a versatile base for building specialized configurations tailored to specific needs. Whether optimizing for accuracy, speed, or versatility, the WA-15B accepts virtually all standard AR-15 components, allowing shooters to modify and upgrade their firearm throughout its service life. Why Buy From CaliperDepot? CaliperDepot maintains a carefully curated inventory of quality firearms and components, ensuring that customers receive products from reputable manufacturers like Windham Weaponry. Our competitive pricing reflects volume relationships with major manufacturers, allowing us to pass savings directly to customers without compromising on quality or service. Fast, reliable shipping with professional handling ensures your WA-15B arrives in perfect condition, ready for immediate use after FFL transfer and inspection. Our customer service team stands ready to answer technical questions and provide guidance on ammunition selection, accessories, and maintenance. Shopping at CaliperDepot means supporting a retailer committed to firearm enthusiasts and legitimate sporting interests. We maintain strict FFL compliance and only sell to qualified buyers in accordance with all federal, state, and local regulations. Our knowledgeable staff can recommend complementary products like quality ammunition, optics, and maintenance supplies to maximize your investment. In-stock inventory means faster fulfillment and the peace of mind that comes from knowing your order is being processed immediately. The Windham Weaponry WA-15B .300 Blackout 10.5″ AR Pistol with SBA3 Brace represents an exceptional value for shooters seeking a quality, American-made defensive platform. This versatile firearm serves admirably in home defense, tactical training, and suppressed shooting applications. Order your WA-15B from CaliperDepot today and experience the reliability and precision that Windham Weaponry delivers. Contact our customer service team if you have questions about this outstanding AR pistol or need help selecting compatible ammunition and accessories.