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RSR Stock #: HFR400
Manufacturer Part #: FR400
UPC: 090255713978

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Frontier Cartridge, Lake City, 300 Blackout, 125 Grain, Full Metal Jacket, 20 Round Box


Warning: Discharging firearms in poorly ventilated areas, cleaning firearms or handling ammunition may result in exposure to lead and other substances known to the State of California to cause birth defects, reproductive harm and other serious physical injury. Have adequate ventilation at all times. Wash hands thoroughly after exposures.


"GLOCK” is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. or GLOCK Ges.m.b.H.  Neither RSR Group, Inc. nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.m.b.H.  The use of “GLOCK” on this page is merely to advertise the sale of GLOCK pistols, parts, or components.  For genuine GLOCK, Inc. and GLOCK Ges.m.b.H. products and parts visit

  • 300 Blackout
  • 2,175 Feet per second
  • 125 Grain full metal jacket
  • Frontier
  • 20 Rounds per box

Product Description

Frontier(R) Cartridge offers ammunition configured for a wide range of shooters and applications, everything from plinking, target shooting and hunting to law enforcement training and self-defense.