Both the G&G GTP9 and SMC9 Conversion Kit are available at Combat Sport Supply and here is what they think about both products... "G&G GTP9 Airsoft Pistol and the SMC-9 Conversion Kit Review. The GTP 9 Airsoft Pistol has a lot of Great Features, but one of the Coolest is the Drop in Roni Style SMC 9 conversion to make it a Full Auto Submachine Gun Carbine.

Are they worth it? How Do they Work?

How do you Install the GTP9 into the SMC9 conversion kit?"