300 Blackout – Sergeant Major 125 Gr Zinc Plated Steel FMJ

Manufacturer – Sergeant Major Munition

Bullet – 125 Grain Brass jacket Full Metal Jacket

Case – Zinc Plated Steel Case

Use – Range / Target

Quantity – 20 Rounds Per Box


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UPC: 689481697116MPN / SKU: 689481697116


 Sergeant Major’s 300 Blackout ammunition offers shooters exceptionally valued ammunition for high volume days at the range. With a zinc plated steel case and brass jacket this ammunition is range friendly allowing you to shoot indoors at most ranges. This ammunition is non-corrosive, holds up in harsh climates and is CIP compliant. 

Additional information


Customer Reviews

Based on 3 reviews
Dennis Andrews
Good product, good price

Took 100 of these to the range to break in my new bear creek 10 1/2 inch AR 15. This ammo was to me Quick! Worked great every shot. Wasn’t sure about this product but I am now. Will be back for more.

Michael Grenon
So far so good!

I have fired 160 rounds of both the brass case, and Zinc plated casings of Sergeant Major 125gr blk out. I have had zero issues in those 320 rounds. I used roughly 90 of the brass cased to tune a Rarebreed FRT-15 trigger. Even while experimenting with different gas pressures, buffer springs and buffers...they all went bang, and never had any failures of any type. I certainly recommend them and not just for the price...the quality control was impressive. Every round was seated in the exact same spot, each crimp was identical and they all were exactly the same dimention. The transition from round to case was also very smooth.

Arnold Sung