The M855A1, a 5.56 mm Ball ammunition ... It is suitable for use in most weapons with a 1-in-7 barrel twist. The M855A1 has a copper-jacketed steel core, differing from the previous M855 round ...

But to ensure you win most of your gunfights and to utilize the Grau 5.56 assault rifle better, you must know about its best attachments and perks. This is where our guide comes in handy as we ...