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Brand: Maxim Defense Ammo | MPN: MXM-49005 | Use: Home Defense, Hunting | Caliber: .300 AAC Blackout | Grain: 190 | Bullet: Solid Copper Spun | MUNITIONS EXPRESS
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Maxim Defense .300 AAC Blackout Subsonic 190gr Tumble Upon Impact (TUI) Solid Copper Spun Lead-Free 20/Box

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$41.95 $36.76
(You save $5.19)
This item is not eligible for return:
Due to legal/regulatory and customer safety considerations, all ammunition (ammo) sales are final.
If you want to order a case:
Order a quantity of 25
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Massachusetts, Washington D.C., Alaska, Hawaii, Puerto Rico, U.S. Virgin Islands, or Guam
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Prior to placing an order, please Click Here to read our Ordering Policy regarding restrictions.

California Proposition 65 Warning (California law requires this warning to be given to customers in the State of California):
Warning: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.p65warnings.ca.gov.

Maxim Defense .300 AAC Blackout Subsonic 190gr Tumble Upon Impact (TUI) Solid Copper Spun Lead-Free 20/Box is designed to produce optimized close-quarter defense velocities and terminal performance in short barrel rifles (SBRs). SBRs sometimes lack the velocities and terminal ballistics that rifles with longer barrels produce. Maxim Defense, in partner with Fort Scott Munitions made specific adjustments to produce ammunition optimized specifically for SBRs in close-quarter, home defense and personal defense situations. This ammunition features a non-lead, Solid Copper Spun (SCS) bullet and utilizes Tumble Upon Impact (TUI) bullet technology which produces ballistic wound cavities that exceed the standards of both expanding and fragmenting bullets. The design of the TUI bullet causes the bullet to tumble down to 500 Feet Per Second (FPS). In confined areas and close quarter defense situations, the TUI bullet is also designed to lose momentum, so it is less likely to cause collateral harm to bystanders or structures. This powerful subsonic round provides exceptional accuracy, and is also reliable for hunting. This ammunition is new production, non-corrosive, boxer primed, in reloadable brass cases.

Please Note: Subsonic loads are ideal for shooting through suppressors because they help reduce the sound signature. Subsonic rounds do not exhibit a supersonic crack making them quieter when shot through your favorite can. These loads do not have to be fired through a suppressed firearm and will function in non-suppressed firearms. With the use of a suppressor, your firearm will see dramatically reduced noise and recoil. This round will cycle with and without a suppressor, but Maxim Defense highly recommends using one. This round will also cycle without gun manipulation and will work in most builds. When using a suppressor, Maxim Defense has found this to be one of the quietest functioning rounds. This ammunition meets and follows SAAMI guidelines and standards.


- Cartridge: .300 AAC Blackout
- Bullet Weight: 190 Grains
- Bullet Style: Solid Copper Spun
- Case Type: Brass
- Muzzle Velocity:  FPS
- Muzzle Energy:  FT LBS
- Reloadable: Yes
- Lead Free: Yes
- Primer: Boxer
- Corrosive: No
- 20 Rounds Per Box
- 500 Rounds Per Case
- 25 Boxes Per Case

1 Review

  • need more of this

    Posted by Ted Lonnie on Jul 22nd 2020

    Thank you munitions express for the one box I was able to buy. I wanted to buy at least three boxes but it would not let me because you only had one box in stock. I keep checking back to see if you have more in stock but now for two weeks still none. I shot this through my custom build 300 blk canned rifle and every round shot very accurate and nailed my makeshift target out to about 60 yards. I was happy with the result. The recoil was minimal and very quiet. The only problem is that I need your company to keep this in stock. Please get more of this in. I can not find this ammo anywhere now. thank you

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