The next generation in the evolution of the SIG556 platform, the SIG556 Patrol Rifle integrates the accuracy of a 16” barrel with the maneuverability and quick pointing ergonomics of the SIG556 Short in a compact, no-nonsense package. The reduced length gas system and forearms provide the ideal combination of functionality and light weight. The SIG556 Patrol Rifle is the perfect solution for everything from three gun matches to patrol car deployment. Available in two versions (Swiss type polymer handguards or alloy Quad Rail tactical forend), the SIG556 Patrol Rifle ships standard with the RDSS (Rotary Diopter Sight System), one magazine w/ connector, and hard carry case. Features: • 5.56mm x 45 NATO (.223 REM) • 16” Cold Hammer Forged Barrel • A2 Type Flash Suppressor • Reduced Length Gas Piston w/ 2 Position Gas Valve • Improved Design Trigger Casing • Swiss Type Folding Stock, adjustable for length • Swiss Type Reduced Length Polymer Handguards (Patrol Rifle) • Alloy Quad Rail Reduced Length Tactical Forend (SWAT Patrol Rifle) • RDSS Rotary Diopter Sight System • (1) 30 Round magazine • SIG SAUER Hard Carry Case
Caliber Dictionary
The Below Information Has Been Provided From Our Gun Caliber Dictionary And Is Meant For Informational Purposes Only. It Is Not Intended to Describe The Unique Specifications For This Ammunition.
The 5.56X45mm NATO cartridge was designed by James Sullivan, a member of Eugene Stoner's engineering team that developed both the M16 rifle and its original cartridge. The 5.56X45mm NATO was adopted by the U.S. military in 1964 and by NATO in 1980. With bullet diameter of .224-inch, the original M193 military cartridge used a 55-grain bullet at 3250 fps; the current M855A1 cartridge, developed by FN, uses a 62.5-grain bullet at 3020 fps, offering greater range and better penetration. The civilian version of the 5.56X45mm is 223 Remington; the cartridges are dimensionally identical but military chamber dimensions and specifications for military brass are different. It is considered safe to use 223 Remington ammo in a 5.56X45MM NATO chamber, but not a good idea to use 5.56X45mm ammo in a rifle specifically chambered for the 223 Remington. Although the stopping power of .22-caliber bullets remains controversial the 5.56X45mm has served well in now multiple generations of M16 rifles. — Craig Boddington
