Airsoft APS Shell Shotgun Revolver

Do you want a semi auto 5 shot revolver that uses APS shells? This is the pistol for you! The trigger pull is long and a bit awkward the first couple of times you use it but it's a blast to use.
DISCLAIMER: 3D printed parts may need sanding to work properly. I have found a light sanding on the trigger’s rails makes it slide smoother and sanding the faces and keyways of the cylinder make it rotate easier and faster.
Parts:
M3x12 screw (9x)
M3x10 screw (2x)
M3x8 screw (1x)
M3x5 screw (4x)
M2x6 (2x)
M3x6 countersunk (1x)
3/8” metal rod cut to 87mm
1/8” metal rod cut to 90mm
Tension spring with coiled section measuring roughly 6x13mm
Compression spring measuring roughly 4x23mm
Neodymium magnet 12x3mm with center tapered hole
24gauge steel wire
AEG pistol grip
2x6x2.5mm ball bearings (2x)

UPADTE:
I know not everyone will have M3 heat set inserts so I’ve added a revised FrameRightNoInsert that has smaller interference fit holes so that the M3 screws will bite into the frame material without the need for the brass inserts. Please note doing it this way it is much easier to strip out the 3D printed material as the screw bites directly into the plastic. You can use slightly longer screws without the brass insert, just don’t over tighten them!

FAQ:
Do I need M3 brass inserts? No, I have made an alternate frame half that doesn’t use them.
Do I need the metal rods? Technically no, you are more that welcome to replicate and print them, I like the metal for strength in those two areas.
Is the magnet necessary? No, it's there to help keep the cylinder pin from shaking loose with the muzzle pointed toward the ground. The pistol works just fine without it.
Why are the two screws in the barrel pin black? The majority of the screws (all silver) are stainless which has poor attraction to magnets. The two black screws are normal steel and work well to attract the magnet and keep the cylinder pin in place.
What grip do I need? The mounting provisions for the grip are standard AEG holes and should work with most AEG motor grips. In my testing some fit better than others so your mileage may vary.
Where did you get the springs? The tension spring came in an assorted box of springs that Home Depot sells in the hardware section. It's about the size of a box of cigarettes and has lots of randomly sized tension and compression springs. The compression spring came from a ball point pen.
Where did you get the ball bearings? Amazon, just search the bearing size and they should pop up. Mine came in a 20 pack for $14.