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Magtech First Defense .300 Blackout 123 gr FMJ

.300 Blackout · 123 gr · FMJ

Bullet

FMJ

Weight

123 gr

Casing

Unknown

Aggregate confidence: 84%Worst listing freshness: FreshHover for what this means

Retailer comparison (28)

Purchases are completed on third-party retailer websites under their terms. Round Recon does not process payments or verify eligibility. See our User responsibility notice.
RetailerPriceCPRRoundsStockFreshnessLast verifiedBuyWatch
Express AmmoTrust 0.50 / 1.00
$34.36$0.687/rd50Out of stock
Fresh
8/12/2026, 10:42:00 AMBuy at Express Ammo
MontanaAR15Trust 0.50 / 1.00
$34.39$0.688/rd50In stock
Fresh
8/12/2026, 2:46:00 PMBuy at MontanaAR15
True Shot AmmoTrust 0.50 / 1.00
$34.43$0.690/rd50Out of stock
Fresh
8/12/2026, 10:09:00 PMBuy at True Shot Ammo
SG AmmoTrust 0.50 / 1.00
$699.80$0.700/rd1,000In stock
Fresh
8/12/2026, 7:56:00 PMBuy at SG Ammo
Centerfire SystemsTrust 0.50 / 1.00
$712.99$0.713/rd1,000In stock
Fresh
8/13/2026, 7:45:00 AMBuy at Centerfire Systems
AmmoSouthTrust 0.50 / 1.00
$35.69$0.714/rd50Out of stock
Fresh
8/13/2026, 4:48:00 AMBuy at AmmoSouth
Rivertown MunitionsTrust 0.50 / 1.00
$35.99$0.720/rd50In stock
Fresh
8/3/2026, 7:12:00 PMBuy at Rivertown Munitions
SG AmmoTrust 0.50 / 1.00
$719.80$0.720/rd1,000In stock
Fresh
8/12/2026, 7:56:00 PMBuy at SG Ammo
2A WarehouseTrust 0.50 / 1.00
$36.71$0.734/rd50In stock
Fresh
8/3/2026, 12:00:00 AMBuy at 2A Warehouse
Centerfire SystemsTrust 0.50 / 1.00
$36.99$0.740/rd50In stock
Fresh
8/13/2026, 7:45:00 AMBuy at Centerfire Systems
SG AmmoTrust 0.50 / 1.00
$369.95$0.740/rd500In stock
Fresh
8/12/2026, 7:56:00 PMBuy at SG Ammo
SG AmmoTrust 0.50 / 1.00
$36.95$0.740/rd50In stock
Fresh
8/12/2026, 7:56:00 PMBuy at SG Ammo
Ammo WallTrust 0.50 / 1.00
$37.02$0.740/rd50Out of stock
Fresh
8/13/2026, 2:57:01 AMBuy at Ammo Wall
SG AmmoTrust 0.50 / 1.00
$189.50$0.760/rd250In stock
Fresh
8/12/2026, 7:56:00 PMBuy at SG Ammo
Dance's Sporting GoodsTrust 0.50 / 1.00
$42.99$0.860/rd50Unknown
Fresh
8/13/2026, 9:13:00 AMBuy at Dance's Sporting Goods
American ReloadingTrust 0.50 / 1.00
$44.99$0.900/rd50In stock
Fresh
8/13/2026, 1:06:00 AMBuy at American Reloading
Rivertown MunitionsTrust 0.50 / 1.00
$699.00$13.980/rd50In stock
Fresh
8/3/2026, 7:12:00 PMBuy at Rivertown Munitions
Ammo.comTrust 0.50 / 1.00
$39.99—50In stock
Fresh
8/7/2026, 3:41:00 AMBuy at Ammo.com
Ammo.comTrust 0.50 / 1.00
$39.99—50In stock
Fresh
8/7/2026, 3:41:00 AMBuy at Ammo.com
Ammo.comTrust 0.50 / 1.00
$39.99—50In stock
Fresh
8/7/2026, 3:41:00 AMBuy at Ammo.com
Ammo.comTrust 0.50 / 1.00
$39.99—50In stock
Fresh
8/7/2026, 3:41:00 AMBuy at Ammo.com
Ammo.comTrust 0.50 / 1.00
$39.99—50In stock
Fresh
8/7/2026, 3:41:00 AMBuy at Ammo.com
Wild Horse AmmoTrust 0.50 / 1.00
$37.47——In stock
Fresh
8/12/2026, 11:37:00 PMBuy at Wild Horse Ammo
Ammo.comTrust 0.50 / 1.00
$39.99—50In stock
Fresh
8/7/2026, 3:41:00 AMBuy at Ammo.com
Ammo.comTrust 0.50 / 1.00
$39.99—50In stock
Fresh
8/7/2026, 3:41:00 AMBuy at Ammo.com
Ammo.comTrust 0.50 / 1.00
$39.99—50In stock
Fresh
8/7/2026, 3:41:00 AMBuy at Ammo.com
Ammo.comTrust 0.50 / 1.00
$39.99—50In stock
Fresh
8/7/2026, 3:41:00 AMBuy at Ammo.com
Ammo.comTrust 0.50 / 1.00
$39.99—50In stock
Fresh
8/7/2026, 3:41:00 AMBuy at Ammo.com

Price history

Price history chartPrice history for Magtech First Defense .300 Blackout 123 gr FMJ from Jun 4 to Aug 11, showing 17 retailers.$-0.642$3.346$7.334$11.321$15.309Jun 4Jun 21Jul 8Jul 25Aug 11Price per roundExpress Ammo: $0.687/rd on Jun 13MontanaAR15: $0.688/rd on Jun 14True Shot Ammo: $0.690/rd on Jun 4SG Ammo: $0.700/rd on Jun 4Centerfire Systems: $0.713/rd on Jul 23AmmoSouth: $0.714/rd on Jun 4Rivertown Munitions: $0.720/rd on Jun 12SG Ammo: $0.720/rd on Jun 42A Warehouse: $0.734/rd on Jul 21Centerfire Systems: $0.740/rd on Jul 23SG Ammo: $0.740/rd on Jun 4SG Ammo: $0.740/rd on Jun 4Ammo Wall: $0.740/rd on Jun 4SG Ammo: $0.760/rd on Jun 4Dance's Sporting Goods: $0.860/rd on Jun 19American Reloading: $0.900/rd on Aug 11Rivertown Munitions: $13.980/rd on Jun 12
  • Express Ammo
  • MontanaAR15
  • True Shot Ammo
  • SG Ammo
  • Centerfire Systems
  • AmmoSouth
  • Rivertown Munitions
  • SG Ammo
  • 2A Warehouse
  • Centerfire Systems
  • SG Ammo
  • SG Ammo
  • Ammo Wall
  • SG Ammo
  • Dance's Sporting Goods
  • American Reloading
  • Rivertown Munitions
View price history data table
RetailerDate observedPricePrice per roundStock status
Ammo.com8/4/2026, 3:55:37 AM$39.99—in_stock
Ammo.com8/4/2026, 3:55:45 AM$39.99—in_stock
Ammo.com8/4/2026, 3:56:53 AM$39.99—in_stock
Ammo.com8/4/2026, 3:55:56 AM$39.99—in_stock
Ammo.com8/4/2026, 3:56:24 AM$39.99—in_stock
Wild Horse Ammo6/12/2026, 11:25:09 PM$37.47—in_stock
Ammo.com8/4/2026, 3:55:29 AM$39.99—in_stock
Ammo.com8/4/2026, 3:56:32 AM$39.99—in_stock
Ammo.com8/4/2026, 3:56:41 AM$39.99—in_stock
Ammo.com8/4/2026, 3:56:06 AM$39.99—in_stock
Ammo.com8/4/2026, 3:56:15 AM$39.99—in_stock
Express Ammo6/13/2026, 8:21:14 AM$34.36$0.687/rdout_of_stock
MontanaAR156/14/2026, 2:14:12 PM$34.39$0.688/rdin_stock
True Shot Ammo6/4/2026, 1:21:35 AM$34.43$0.690/rdout_of_stock
SG Ammo6/4/2026, 12:59:34 AM$699.80$0.700/rdin_stock
Centerfire Systems7/23/2026, 7:45:04 AM$712.99$0.713/rdin_stock
AmmoSouth6/4/2026, 5:28:00 AM$35.69$0.714/rdout_of_stock
Rivertown Munitions6/12/2026, 5:42:42 PM$35.99$0.720/rdin_stock
SG Ammo6/4/2026, 12:59:34 AM$719.80$0.720/rdin_stock
2A Warehouse7/21/2026, 12:01:16 AM$36.71$0.734/rdin_stock
Centerfire Systems7/23/2026, 7:45:04 AM$36.99$0.740/rdin_stock
SG Ammo6/4/2026, 12:59:34 AM$369.95$0.740/rdin_stock
SG Ammo6/4/2026, 12:59:34 AM$36.95$0.740/rdin_stock
Ammo Wall6/4/2026, 12:27:41 AM$37.02$0.740/rdout_of_stock
SG Ammo6/4/2026, 12:59:34 AM$189.50$0.760/rdin_stock
Dance's Sporting Goods6/19/2026, 9:08:44 AM$42.99$0.860/rdunknown
American Reloading8/11/2026, 1:06:00 AM$44.99$0.900/rdin_stock
Rivertown Munitions6/12/2026, 5:42:39 PM$699.00$13.980/rdin_stock

Product details

Brand
Magtech
Product line
First Defense
Caliber
.300 Blackout
Bullet weight
123 gr
Bullet type
FMJ
Case material
Unknown

Use cases

training

JHP
Jacketed Hollow Point — designed to expand on impact, typical for self-defense.
FMJ
Full Metal Jacket — non-expanding round, common for range/training use.
HP
Hollow Point — bullet tip designed to expand on impact.
Brass
Brass cases are reloadable and corrosion-resistant; the most common case material.
Steel
Steel cases are cheaper but not reloadable and can wear extractors over time.
Reloaded
Remanufactured ammunition using once-fired brass — usually cheaper, never use in carry guns.
Subsonic
Travels below the speed of sound — quieter, often used with suppressors.

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