Tiger111HK gives us a closer look at the PTS Mega Arms MKM AR-15 GBB which they now have in stock... "PTS Mega Arms GBB Rifle is the newest airsoft rifle manufactured by KWA, means it comes with the newly developed KSC / KWA System 7 Two GBB System which makes this Mega Ams GBB has a great performance either in realistic training or gaming. It also comes with the Mega Arms style metal receiver set (the upper receiver was the new one-piece receiver, which is more duarble when compare with KSC / KWA M4 GBB) and Mega Arms style trigger set."