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

Gotw Wilson Combat Divison 77 Project 1 Web
Gotw Wilson Combat Divison 77 Project 1 Web

Gun Of The Week: Wilson Combat Division 77 Project 1

Join American Rifleman staff on the range in this video to get a closer look at Wilson Combat’s somewhat cryptically named “Division 77 Project 1.” 

The Armed Citizen® July 18, 2025

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

Review: POF-USA LMR BASE Rifle

The Patriot Ordnance Factory LMR Base offers a .308 Win. chambering in a lightweight, AR-15-size package, which makes it a capable platform for today's new gun owner. And it comes at a fair price.

2025 Accessory Of The Year: Wyoming Sight Drifter

For each of the past 23 years, the editors of American Rifleman have convened to select our top picks for the past year’s best and most innovative products. Here are the most recent winners.

Henry Donates Rifles To Support Young Leukemia Victim

Henry Repeating Arms has donated a limited run of 50 “Team Keane” Golden Boy .22 lever-action rifles to support 13-year-old Keane Rhodes of Universal City, Texas, who is currently undergoing aggressive treatment for ALL T-cell leukemia.

Rifleman Review: Springfield Armory Echelon

Springfield Armory introduced its Echelon in 2023, bringing a modernized, chassis-style, striker-fired handgun to the market that has since seen several notable line extensions.

Interests



Get the best of American Rifleman delivered to your inbox.