Well, here it is. It operates on a simple rubber band loaded firing pin design, which transfers energy to the ammo after being released by the pivoting trigger mechanism. Shoots grey connecters with green rods, removable mag, pin guide, has a charging handle, and is almost completely 1:1 scale.
Have fun.

WARNING:REQUIRES CUT PARTS

Step 1: Stock

Read the image notes. They contain the instructions.

Step 2: Reciever

Read the image notes. They contain the instructions. The first two pictures are two views of the same thing.

Step 3: Rail System and Fake Barrel

Read the image notes. They contain the instructions.

Step 4: Magazine

These are detachable, internally pushed, and roofed. Read the image notes. They contain the instructions. Make as many as you can. load with One slot grey connectors with a green rod in the slot.

Step 5: Assembly.

Read the image notes. They contain the instructions.

Step 6: Done/Gallery

Here's your cookie. Use the band on the trigger guard to band the mag release if you haven't already done so. Band the Pin however you want. With 1 string of 2 #64s, I got a nice 30 feet. Have fun! If you make this, I will post your pic on this step. if you have a nice attachment you want in the 'ible, I'll make a step for it.