The FN, Ruger and Smith & Wesson offerings sport barrel lengths of 4.80″, 4.94" and 5.00" respectively. This makes the 5.7 Rock Compact's 4.3" barrel the shortest yet.

Catering to the growing number of firearms on the market chambered for the 5.7x28 mm FN cartridge, FN America has announced the addition of two new 5.7x28 mm ammunition options.

At least one gun used by Nidal Malik Hasan at Fort Hood was an FN Herstal 5.7 semiautomatic—which also happens to be a weapon of choice for Mexican cartels who battle the military and police.

While at $799 it’s pricier than most pistols you would buy, its only competition in the market of 5.7 x 28-millimeter is the FN Five-seveN, which sits way up at $1,199.

CMMG recently unveiled a new line of super-compact AR15 style pistols and short-barreled rifles chambered in FN 5.7x28mm. ... camouflage, ammunition as well as readiness and training issues.