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No. While the cartridges are similar in size, they are not interchangeable. Firing .300 BLK in a .223/5.56 chamber is dangerous and can result in serious injury or damage to your firearm.
.300 Blackout Ammo
Showing 1–12 of 19 resultsSorted by popularity
20-Round
200-Round
3 reviews
$27.99
20 rounds / $1.40 per round
$269.99
200 rounds / $1.35 per round
50-Round
1000-Round
2 reviews
$33.99
50 rounds / $0.68 per round
$659.99
1000 rounds / $0.66 per round
Add to cart
Out of stock
20-Round
500-Round
1 review
$22.99
20 rounds / $1.15 per round
$549.99
500 rounds / $1.10 per round
20-Round
200-Round
$27.99
20 rounds / $1.40 per round
$269.99
200 rounds / $1.35 per round
Add to cart
Out of stock
25-Round
500-Round
$27.99
25 rounds / $1.12 per round
$539.99
500 rounds / $1.08 per round
20-Round
200-Round
1 review
$16.49
20 rounds / $0.82 per round
$159.99
200 rounds / $0.80 per round
20-Round
200-Round
1 review
$21.99
20 rounds / $1.10 per round
$199.99
200 rounds / $1.00 per round
20-Round
200-Round
$27.99
20 rounds / $1.40 per round
$269.99
200 rounds / $1.35 per round
20-Round
500-Round
5 reviews
$16.99
20 rounds / $0.85 per round
$339.99
500 rounds / $0.68 per round
Out of stock
50-Round
1000-Round
$35.99
50 rounds / $0.72 per round
$699.99
1000 rounds / $0.70 per round
Out of stock
20-Round
500-Round
2 reviews
$19.99
20 rounds / $1.00 per round
$449.99
500 rounds / $0.90 per round
Out of stock
20-Round
200-Round
3 reviews
$17.99
20 rounds / $0.90 per round
$169.99
200 rounds / $0.85 per round
Out of stock
FAQs
Can I shoot .300 Blackout in a .223 or 5.56 rifle?
Will .300 Blackout work in a standard AR-15 magazine?
Yes, you can load .300 Blackout ammo in standard AR-15 magazines in .2235/5.56. However, we recommend purchasing magazines dedicated for .300 Blackout as they have improved internal geometry and unique identification markers.
What's the difference between subsonic and supersonic .300 Blackout ammo?
Supersonic .300 BLK travels above the speed of sound and is better for hunting or self-defense due to its higher velocity and energy. Subsonic loads are slower and quieter, especially when paired with a suppressor—ideal for tactical or stealth applications.
Is .300 AAC Blackout the same as 7.62x35mm?
Yes, they are the same.