Maxim Defense (part no. MXM-49143) loads this 8.6 Blackout round with a 285-grain solid copper bullet built around their Tumble Upon Impact (TUI) technology, developed in partnership with Fort Scott Munitions specifically to address a real problem: short-barrel rifles excel in close-quarter encounters but often lack the velocity and terminal performance a longer barrel delivers. Maxim Defense markets this as SBA, Short Barrel Ammunition, engineered so the TUI projectile keeps tumbling for its wound effect all the way down to 500 fps, which the company markets as exceeding the standards of both expanding and fragmenting projectiles. In rifle ammunition built specifically for short-barrel platforms, this is a purpose-engineered load.

Key Specifications

• The chambering is 8.6 Blackout, a heavy-bullet short-barrel cartridge.
• The bullet weighs 285 grains.
• The projectile is solid copper, using Tumble Upon Impact (TUI) technology.
• Maxim Defense developed this load in partnership with Fort Scott Munitions.
• This is marketed as SBA (Short Barrel Ammunition), optimized specifically for SBRs.
• The TUI bullet continues to tumble down to 500 fps, well below typical impact velocities.
• The cost works out to about $2.81 per round at the listed box price.
• Each box holds 20 rounds.
• Maxim Defense is primarily known for SBR suppressor hosts and buffer systems, with ammunition as a newer product line.

Frequently Asked Questions

What is 8.6 Blackout built for? It’s a heavy-bullet cartridge designed to deliver strong terminal performance from short-barrel rifles, where velocity loss hurts lighter, faster cartridges more.

Does the TUI bullet expand or fragment? Neither in the traditional sense. It’s engineered to tumble on impact, and Maxim Defense markets the resulting wound cavity as exceeding the standards of both expanding and fragmenting projectiles.

Buy Maxim Defense 8.6 Blackout 285gr TUI SBA Ammo

Short-barrel rifles need ammunition engineered around their specific velocity loss, and this heavy-bullet TUI load is purpose-built for exactly that. Order from our Lubbock, Texas gun shop and it ships fast to your door.