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SIG SAUER Introduces 120gr Supersonic 300BLK SBR Elite Copper Duty Ammunition for Short Barrel Rifles

NEWINGTON, N.H., (February 12, 2019) –SIG SAUER, Inc. is pleased to introduce its newest 300BLK ammunition – the 120gr supersonic 300BLK SBR Elite Copper Duty load, specifically designed for short barrel rifles.  Available to the commercial market for the first time, this supersonic duty round is engineered for reliable, controlled, 1.8x expansion, and superior feeding out of rifles with sub-9-inch barrels. 

The supersonic SBR Elite Copper Duty ammunition features an all-copper bullet and black oxide shell case to visually denote SBR capability. Velocity is 1,897 fps with muzzle energy of 959 ft-lbs out of a 6 ¾-inch barrel.

“The new 120gr supersonic SBR Elite Copper Duty ammunition delivers the highest terminal performance possible in short barrel AR-style rifles, something the professional community has been asking us to provide,” said Brad Criner, Senior Director, Brand Management and Business Development, SIG SAUER Ammunition. “Our various SIG Elite 300BLK ammunition loadings have been well received by match shooters, hunters, and law enforcement and government agencies, and there will be more exciting 300BLK offerings from SIG in the weeks to come.”

SIG Elite Copper Duty ammunition uses flash-reduced propellant to minimize visible signature while shooting in low-light situations. Premium-quality primers are also used to minimize variations in velocity

The SIG SAUER 120gr supersonic 300BLK SBR Elite Copper Duty ammunition is now available for purchase at the sigsauer.com/store.

5 Responses to “SIG SAUER Introduces 120gr Supersonic 300BLK SBR Elite Copper Duty Ammunition for Short Barrel Rifles”

  1. kemp says:

    can somebody shed some light on how a subsonic 120gr performs better than a subsonic 220gr projectile?

    • AbnMedOps says:

      Perhaps reduced risk of over-penetration? Maybe less propellant gas needing to be cooled, thus improving suppressor performance?

    • charlie says:

      Because this is a supersonic round, not a subsonic one.

    • Dev says:

      subsonics typically dont expand as well unless they are specifically designed to expand. so youre relying on the weight of the projectile to cause damage to the target so if the round isnt going to expand then youre going to want the heavier round to punch through the target. plus the trajectory is basically going to be the same if the bullets leave the barrel at ~1050fps