Can this be done?

[Rockwolf66]

Originally Posted by Gunmaster45

But a G3KA4 with an M203 is a major mall ninja weapon (no offense). Plus, your going to need lots of money to pay for the Class III liscense and Destructive Device liscense you need to own these weapons.

Well with that combination I can take the M-203 off and mount it on anything with a rail interface and with an Unmarried sear or triggerpack I can unless I am mistaken own various "uppers" so to speak and switch out the trigger pack depending on how I feel.