Ruger SR-556

Ruger SR-556

Type	Semi-automatic rifle
Place of origin	United States
Production history
Designed	2009
Manufacturer	Sturm, Ruger & Company, Inc.
Specifications
Weight	7.92 lb (3.6 kg)
Length	36 in (910 mm) with extended stock, 32.75 in (832 mm) fully collapsed stock
Barrel length	16.12 in (409 mm)
Caliber	.223 Remington/5.56 NATO, 6.8 mm Remington SPC
Action	Gas-operated, rotating bolt
Feed system	STANAG magazine