The 556-style version of the G&G PCC45 AEG, the G&G MCP 556 is available at Airsoft Master and they walk us through its features... "G&G Armament thought what would the PCC45 or the MXC 9mm would like in a 556 variant. Well say no more!!! We have here is the MCP556 AEG! It's a nice product and is easier to share m4 magazines with the rifle. If you want to check out this rifle check it out in airsoftmaster.com and coming soon in our walk in store."