This gun fires three rounds semi-automatically for each pump. It has 40 or so feet of range when you use the proper elastics (use ones that look like the kind I used). The long front end is on there to allow you to rest its weight on things (the front rest combined with the curved butt allow you to keep all the weight off your hands when you are stationary. Although not a great war weapon as the trigger mech is touchy, it weighs 9 pounds and is top heavy. Fun engineering and fun gun though.
Firing Demonstration VIDEO:
Step 1: Handle
2, 3: Build this.
Step 2: Pump
2: Build this.
3: Build this.
4: Slide part from step 3 onto part from step 2.
5: Attach a white connector to the yellow rods as shown.
6, 7: Continue to attach white connectors until the row is filled.
8: Add the rest of the pieces to complete the plate (it should be the same as the one on the other side when finished).
9, 10: Insert the pump.
Step 3: Butt
2: Build these (7 layers)
3: Slide parts together.
4, 5: Push in the yellow rods that are attached to the 7 layers.
6, 7: Attach the connectors shown (don't attach the small green rods yet)
8: Push the connectors in place as shown.
9, 10: Add the small green rods.
Step 4: Block Structure
3, 4: Build this.
5, 6: Connect.
7, 8: Add outer layer as shown one piece at a time on the RIGHT side only (make sure that you are adding the parts to the correct side).
9: Copy the panel that you just added on the right side to the left side while leaving out the two connectors and attaching green rods as shown.
10, 11: Build this.
12: Nestle it in place.
13: Add two white connectors and their attaching green rods to complete the left panel.
14: Build these three blocks (add cut in half green rods or cut the tips from longer rods to put on the tops of the blocks in the orange connectors for strength).
15: Insert them as shown.
Step 5: Top Pins Guide
5-7: Build this.
8, 9: Connect.
Step 6: Bottom Pins Guide
Step 7: Trigger Mech
11-13: The blue rods in the images don't need to be blue rods, but do need to be cut rods.
Last photo: Before you close the mech up, make sure that it's done to the best of your knowledge and that it will work.