6mm Badger uses the Firewad AAP01 MP5 Lower Receiver for the AAP-01 GBB Pistol to accept MP5 gas magazines... "In this video, I take a stock Action Army AAP-01 and transform it using a 3D-printed lower receiver designed to accept MP5 AEG magazines. The design is called the Firewad AAP01 MP5 Lower Receiver, and it totally changes the way the AAP looks and feeds.

I follow along with the tutorial video during the build, and while most of it goes smoothly, I do run into a couple of issues:

• Getting the magazine catch to work reliably
• BBs not feeding properly from the MP5 mag

Despite the hiccups, the build comes together nicely and looks awesome — but I’ll definitely need to do some follow-up tweaks.

I’ll be doing a second video soon where I 3D print and install a matching upper receiver, so stay tuned for the full custom AAP-01 SMG-style build!"