Though some sporting .223 Rem. production rifles still have slow-twist barrels, most gun makers have adopted 1:7 or 1:8 to accommodate a wider variety of bullets. Because traditional twist rates are ...

It works with the M4 Carbine, the M249 machine gun, and the H&K and M16A2 rifles. It is suitable for use in most weapons with a 1-in-7 barrel twist. The M855A1 has a copper-jacketed steel core ...

For illustrative purposes. (Janes/ Amael Kotlarski) Heckler & Koch (H&K) is currently developing a 5.56×45 mm version of the HK421 light machine gun (LMG), which is currently chambered in 7.62× ...

Though some sporting .223 Rem. production rifles still have slow-twist barrels, most gun makers have adopted 1:7 or 1:8 to accommodate a wider variety of bullets. Because traditional twist rates ...