The Steyr STM-556 is a rare piston-driven AR-15 variant that attempted to integrate features from the Steyr AUG, such as a quick-change barrel system. Introduced in 2011 and released commercially in 2020, only 300 units were produced for the civilian market. While featuring an adjustable gas system and an ambidextrous bolt catch, its proprietary barrel system, unconventional ergonomics, and high cost contributed to its commercial failure. The rifle demonstrated reliable function during testing but was ultimately deemed a miss by reviewers.
Larry Vickers, a 20-year US special operations veteran, reviews the Bravo Company (BCM) Gunfighter Stock. He highlights its strength, light weight compared to standard milspec stocks, and features like a vehicle born operation sling tab for compact storage and reduced snag hazard. The stock is designed to fit milspec buffer tubes only and offers multiple sling attachment points.
This video provides a detailed look at the BCM Gunfighter Mod 0 stock system for AR-15 platforms. It highlights the stock's lightweight yet strong polymer construction, its snag-free design, and enhanced cheek weld compared to standard M4 stocks. The review also covers its QD sling mount options, the optional VBOS tab for vehicle operations, and a step-by-step guide for disassembly and reassembly, emphasizing its robust locking mechanism and ease of adjustment.
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