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

Smith & Wesson Academy
Smith & Wesson Academy

A Visit to the New Smith & Wesson Academy

Let the training (re)commence at Smith & Wesson's new Academy in Tennessee.

New for 2026: Leupold LCO Pro F2 Red-Dot Sight

The optic giant has updated its flagship red-dot sight with a host of upgraded features.

Rifleman Review: Heckler & Koch CC9

When Heckler & Koch USA launched its micro-compact CC9, it proved to be one of the most robustly built micro-compact handguns yet made.

Beyond the Headlines on Armed Citizen Stories

Concealed carriers in the U.S. commit almost no crimes with their lawfully owned firearms. Armed citizens do, however, stop a lot of crimes.

Rifleman Interview: Smith & Wesson FPC and M&P22X

Smith & Wesson’s latest rimfire semi-autos were on display at Plinkapalooza in May.

Taking It Home: War Trophies in American History

From our founding to the more recent past, war-trophy firearms have played a significant role in arming American citizens.

Interests



Get the best of American Rifleman delivered to your inbox.