SIG Sauer Supersonic 300 BLK SBR Ammo Now Commercially Available

by
posted on February 13, 2019
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
sigsbr_ammo.jpg

SIG Sauer’s newest 300 BLK ammunition–the 120-gr. supersonic 300 BLK SBR Elite Copper Duty load—is 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” 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” barrel.

“The new 120-gr. 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 300 BLK ammunition loadings have been well received by match shooters, hunters, and law enforcement and government agencies, and there will be more exciting 300 BLK 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 120-gr. supersonic 300 BLK SBR Elite Copper Duty ammunition is now available for purchase at the sigsauer.com/store.

Latest

Franchi Momentum MULE rifle
Franchi Momentum MULE rifle

New for 2026: Franchi Momentum Mule Rifle

Franchi’s do-it-all MULE rifle is designed as a general-purpose carbine.

New for 2026: Smith & Wesson Spec Series M&P9 and R Handguns

Smith & Wesson expands its Spec series with the Spec Series IV M&P9 M2.0 Metal Compact pistol and the Spec Series R revolver.

New for 2026: Henry Provider and Protector Rifles

For 2026, Henry adds two new product families, one designed for hunting, the other for protection.

Gun Of The Week: Daniel Defense DDPCC 9 mm Carbine

Daniel Defense's pistol-caliber carbine, the DDPCC, offers AR-15-style operation in a more budget-friendly caliber.

The Armed Citizen® Jan. 23, 2026

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

New for 2026: Stoeger STR-45 Combat Pistol

For 2026, Stoeger adds the .45 ACP chambering to its Combat line of STR handguns.

Interests



Get the best of American Rifleman delivered to your inbox.