Complex sentence: Each model is chambered in 5.56mm NATO /.223 Remington and has a six-position collapsible stock, they come with either a melonite lined or chrome-lined 4140 steel barrel, and 7075 T6 aluminum receiver with a hard-coat black anodized finish.
Split into simpler sentences: Each model is chambered in 5.56mm NATO /.223 Remington and has a six-position collapsible stock. They come with either a melonite lined or chrome-lined 4140 steel barrel, and 7075 T6 aluminum receiver with a hard-coat black anodized finish.