Alexander Arms RTA65ST Tactical 6.5 Grendel 16" 11-Round Rifle

The Alexander Arms RTA65ST Tactical 6.5 Grendel rifle is a purpose-built semi-automatic platform chambered in 6.5 Grendel, a cartridge specifically engineered for intermediate-range precision and barrier-blind performance. This 16-inch threaded barrel rifle combines Alexander Arms' expertise in Grendel ammunition and firearm design with tactical ergonomics suitable for patrol, training, and specialized shooting disciplines where velocity, accuracy, and modularity are priorities.

The RTA65ST features a black anodized Picatinny rail aluminum receiver paired with an M-LOK handguard for tool-free accessory mounting, enabling rapid customization without gunsmithing. The 16-inch threaded barrel accepts standard muzzle devices and delivers the ballistic advantages of 6.5 Grendel—superior penetration and velocity compared to 5.56 NATO at equivalent distances—while maintaining a compact overall length of 38.5 inches with the B5 Systems BRAVO stock fully collapsed. The A2 flash hider reduces muzzle signature, a critical consideration for low-light engagements and training environments. Total weight of 9.8 pounds balances control and sustained-fire comfort during extended range sessions or operational duty.

This configuration suits operators, law enforcement specialists, and precision rifle enthusiasts who value the ballistic envelope and terminal performance of 6.5 Grendel over conventional intermediate cartridges. The 10+1 capacity (10-round magazine plus one in the chamber) reflects the specialized ammunition positioning of this caliber. M-LOK compatibility and Picatinny mounting surfaces support the full range of modern tactical optics, lights, and rail systems, allowing shooters to build a mission-specific platform. Alexander Arms' long manufacturing history in Grendel ammunition ensures reliable component sourcing and design validation.