Maxim Defense 5.56 NATO 55gr TUI Short Barrel Optimized – 20 Rounds

Maxim Defense Short Barrel Ammunition is purpose-built for AR-15 pistols and SBRs with barrels under 10.5 inches. The 55-grain TUI (Tumble Upon Impact) projectile is a solid copper design engineered to deliver reliable terminal performance from reduced barrel lengths where standard ammunition loses critical velocity. The TUI bullet tumbles upon impact to create wound channels without relying on expansion, making it effective even at lower velocities.

This load generates optimal pressures for short-barrel firearms while reducing flash and concussion compared to M193 ball ammunition. Brass cases and quality primers ensure reliable feeding and ignition. Available in 20-round boxes or 500-round cases for high-volume users running PDWs or compact defensive platforms.

• Caliber: 5.56 NATO
• Bullet Weight: 55 grains
• Bullet Style: TUI (Tumble Upon Impact) solid copper
• Barrel Optimization: Short barrels under 10.5 inches
• Box Count: 20 rounds
• Case Count: 500 rounds (25 boxes)
• Case Type: Brass
• Use: Defensive, short-barrel platforms