this is an improved version of many of the assault rifles you have probably already seen, like fausts.
Step 1: Lets Start With the Middle Section of the Rifle...
for the barrel, we will start with the middle section, it will be much easier when you attach the sides.
Step 2: Sides
now we will make the sides. you are making 2 identical sides. the dots on the pictures should line up as you build the sides onto the middle section. (there are white bars('dots') going through the sides that hook the sides to the middle)
Step 3: Trigger System
for the trigger system, the straight connector (theres 2) is inbetween the two side pieces, and on the outside of the stopper (the 3-slot connecter with the single-slot connect attached to it)
Step 4: Firing Pin
the firing pin is used to hit the ammo inside the gun (i recommend red rods for ammo) it will be fired using rubber bands. if you used glue on the trigger system, you can use more, stronger rubber bands for more distance.
Step 5: Attach Trigger to Rifle
for this part yo will connect the trigger to the rifle. the stopper should touch the middle section and be inbetween the two side halves. you will need to put rubber bands on this part so there is pressure holding it down so it stops the firing pin until you pull the trigger.
Step 6: Attach Firing Pin to Rifle
this is pretty simple. you pull the trigger and hold it, slide in the pin. you can then let go of the trigger and put on your rubber bands. i put on some bars alough the top with the little short connectors with the pin sticking out of them (used mostly to hold wheels and things) so the firing pin and ammo don't fall out. (don't put then too far back, or it stops the top of the firing pin!!)
Step 7: Finish
here is what it should look like when you are done. the last one is after you have cocked the rifle and it is ready to fire!