The 5.56x45mm was established in 1933, IMI is a defense systems house specializing in the development, integration, manufacturing and life cycle support of modern land, air and naval combat systems and HLS solutions. IMI’s world class combat-proven systems are developed by vertically integrated expert teams, working in close cooperation with the customers, the most prominent being the Israel Defense Forces (IDF). IMI’s products have been qualified with the IDF, US Military (Air Force, Army and Navy) and NATO nations.
The SS109 bullet is a steel penetrator tipped, lead core bullet complete with the standard green paint used to designate penetrator tip ammunition. This ammunition is a great choice for the shooter looking for a great affordable round for target shooting, training and practice. This ammunition is non-corrosive in boxer-primed, reloadable brass cases with military primer crimp.
Please Note: While the 5.56x45mm NATO will fit in a .223 Remington chamber, the 5.56 is a military round that runs at higher pressures than its .223 counterpart and is not recommended to be fired in a .223 Remington chamber.
- Box of 30 = As pictured
- Box of 450 = 15 Boxes of 30
- Case of 1200 = 40 boxes of 30
- Convenient 30 round boxes completely fill standard capacity magazines
- NATO qualified
- Designed for use in 5.56mm Rifles and machine guns with 1 in 7″ twist, such as M16A2, M4 and Tavor
- Meets all STANAG 4172 and PFP (NAAG-LG/3-SG/1) D(2004)1 requirements
The Swedish military has measured the bullet velocities of SS109/M855 military cartridges at 4 m (13.1 ft) from the muzzle fired from differing barrel lengths.
|Barrel length||SS109/M855 V4 bullet velocity||V4 velocity loss|
|210 mm (8.3 in)||723 m/s (2,372 ft/s)||41 m/s (135 ft/s)|
|240 mm (9.4 in)||764 m/s (2,507 ft/s)||32 m/s (105 ft/s)|
|270 mm (10.6 in)||796 m/s (2,612 ft/s)||29 m/s (95 ft/s)|
|300 mm (11.8 in)||825 m/s (2,707 ft/s)||18 m/s (59 ft/s)|
|330 mm (13.0 in)||843 m/s (2,766 ft/s)||23 m/s (75 ft/s)|
|360 mm (14.2 in)||866 m/s (2,841 ft/s)||12 m/s (39 ft/s)|
|390 mm (15.4 in)||878 m/s (2,881 ft/s)||14 m/s (46 ft/s)|
|420 mm (16.5 in)||892 m/s (2,927 ft/s)||14 m/s (46 ft/s)|
|450 mm (17.7 in)||906 m/s (2,972 ft/s)||9 m/s (30 ft/s)|
|480 mm (18.9 in)||915 m/s (3,002 ft/s)||7 m/s (23 ft/s)|
|508 mm (20.0 in)||922 m/s (3,025 ft/s)||–|
5.56x45mm NATO versus .223 Remington
The exterior dimensions of the 5.56mm NATO and .223 Remington cartridges are identical. While the cartridges are identical other than powder load, the chamber leade, i.e. the area where the rifling begins, is cut to a sharper angle on some .223 commercial chambers. Because of this, a cartridge loaded to generate 5.56mm pressures in a 5.56mm chamber may develop pressures that exceed SAAMI limits when fired from a short-leade .223 Remington chamber. As the chambers differ, the head space gauges used for the two chamberings differ.