DISCLAIMER: this is just a guide for how to make an airsoft rocket launcher, i am not responsible for any harm to yourself or others. if you do not follow directions fully, it might result in injury.
ps. i am sorry that i have no photos, as i have no camera, however, i will have 3d renderings.
Step 1: Tools and Materials
-5/8 in drill bit
~7 feet of 2" inner diameter pvc pipe (schedule 40)
-two 2" couplings
-two 2" to 1" reducers (threaded)
-one 2" pvc end cap
-two 1" diameter 1" nipple
-one 1" pvc ball valve
-one .625 in tubeless tire inflator nozzles
Step 2: Cut, Measure, and Glue
with the pipe glue, attach the pvc fittings in the following order: coupling, reducer, nipple, ball valve, nipple, reducer, coupling. this will create the firing/holding mechanism. now, take your drill and 5/8" drill bit, and drill a hole in the middle of the end cap. now, take the tire nozzle and push it in the hole as much as possible. now, with the hammer, gently hit the end of the nozzle until it is set in place. the nozzle should be set in place, but for reassurance use the pliers. when done, the 2 1/2' length of tube is the barrel, and the 1 1/2' length is the air chamber.