Anderson Manufacturing's M4 Carbine (AM15M416 ZE) improves on a familiar and reliable military spec rifle. Similar to Anderson's heavy barrel carbine, the M4 is chambered in .223/5.56mm and offers a 16" M4 barrel, optics-ready Picatinny rail and front-mounted, low profile gas block, also with a Picatinny rail. With its Magpul MOE stock and pistol grip and quad rail forend, the M4 Carbine is also treated with RF-85, and features a hard-anodized 8625 F finish with a 7075-T6 aluminum receiver. It comes with two 30-round PMAG Zombie Green magazines and a hard case.