The KJWORKS KP-08 CO2 Airsoft Pistol is KJWORKS first Airsoft pistol with a polymer frame. It’s also very versatile in that you can use KJWORKS KP-05 magazines and even High-Capa Marui Mags if you won them. The red internal gas tube allows you to use pretty much any type of magazine too which means Green gas, propane and CO2 are all good to go with the KJWORKS KP-08 CO2 Airsoft Pistol! The polymer frame really helps keep what would normally be a rather heavy Airsoft pistol a bit bit more light weigth and field friendly but you still have all the perks of a High-Capa 1911 so it’s a win win for me.