Rifle · .300 BLK · 300 AAC · 7.62x35
.300 Blackout Ammo
AR-platform round optimized for short barrels and suppressors.
The read · .300 Blackout
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In stock now
We don't have .300 Blackout in stock from us right now. Set a price alert below and we'll email you when it's back — or when the price drops.
Shipping & the law: Ammunition can't ship everywhere. Some states and cities — including California, New York, Massachusetts, Connecticut, Illinois, and New Jersey — restrict or prohibit online .300 Blackout sales, cap quantities, or require delivery to a licensed FFL or an age-verified adult. Always confirm your own state and local laws before ordering; checkout runs on UNUM's rails, which enforce shipping restrictions at the point of sale. Must be 21+ to purchase.
Ammo prices move fast. We refresh from live listings, but always confirm the current price, shipping, and stock on the seller's own site before you buy.
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About .300 Blackout
.300 Blackout runs in an AR-15 with just a barrel swap and shines suppressed, with subsonic loads for quiet shooting and supersonic for hunting. It's pricier than 5.56 — and dangerous to mix up with it, since .300 BLK can chamber in a 5.56 rifle. Buy and store it clearly separated.
Common bullet weights run 110, 125, 150, 220 grain.