Fort Scott Munitions Sub-Munition TUI 300 AAC Blackout 190gr SCS Centerfire Rifle Ammo - 20 Rounds - Fort Scott Munitions .300 Blackout Sub-Munition TUI ammo is match grade rifle ammunition that is designed to be exceptionally accurate. Engineered to Tumble Upon Impact and create a devastating wound cavity, the unique, patented design of .300 Blackout Sub-Munitions provides outstanding performance.Due to rigorous testing and extreme attention to detail, the precision machined solid copper .300 BLK TUI Sub-Munitions boasts some of the tightest tolerances in the industry. Coupled with multi-patented Tumble Upon Impact design, you're getting some of the most lethal match grade ammunition on the market. FSM's multi-patented Tumble Upon Impact technology pairs perfectly with the shorter ranges of the sub-sonic .300 BLK. Upon entry into soft tissue, the nose of the bullet begins to tip setting the tumbling motion into action. The energy released due to the hydro-static shock of the tumble is enough to tear organs and disrupt major bodily functions while also mitigating the risks of over-penetration due to the high degree of energy transfer.