Magtech First Defense 300 Blackout Ammo - 500 Rounds of 123 Grain FMJ Ammunition
Ammo.com · .300 Blackout
$399.99
(80.0¢/rd)
· 500 rounds
In stock
- Current
- $399.99
- Lowest seen
- $369.99
- Highest seen
- $399.99
Tracked since Aug 19, 2026 · 1 price change.
Price history · the price at each change, across the full time tracked
Compare prices · the same 500-round box at other retailers we track (this one: $399.99)
Confident matches
500 Round Flat Can - 300 Blackout 123 Grain FMJ Magtech Ammo - 300BLKB - Packed in Metal Canister
SGAmmo
70.0¢/rd
$349.95
$50.04 less
Same load and box size, matched by product title. "Possible" matches may be a close variant, so confirm the exact item on the retailer's page before buying.