Introduction: How to Make an Airsoft Mortar
In this Instructable, I will show you how to make a pneumatic, airsoft mortar. Mine shoots 100 - 200 feet and is sturdy and durable. The simple design makes the creation accurate (tripod is adjustable) as well as compact. You may sling the airsoft mortar around your back (due to a sling) for mobility. This weapon generates a wide enough spread to hit multiple people at once. Overall, the mortar only costs between $20 - 25. I AM NOT RESPONSIBLE FOR ANY INJURIES CAUSED BY THIS INSTRUCTABLE!
Step 1: What You Will Need
To make the mortar, you will need:
ITEMS
1: 1-1/2 inch PVC pipe (3 feet) must be thick enough. we're using compressed air.
2: PVC primer
3: tire valve (any size)
4: PVC cement
5: 1-1/2 inch PVC ball valve
6: 1-1/2 inch end cap
7: adjustable tripod (I got mine for $1 at a garage sale)
8: WELDER glue or KRAZY glue (duct tape for heavy usage)
9: 40 millimeter ping pong balls
10: bicycle pump
11: airsoft BBs
TOOLS
1: anything that cuts PVC
STEPS
The idea is simple (very), so just glue the pieces together as shown in graphic aid one, drill a hole in the cap, slide the bike valve in and welder glue that sucker on. (excuse my language) I'd advise drilling the end cap FIRST...
Step 2: PVC Cutting
You will need to cut the PVC pipe into a 2 foot pipe and a 12 inch pipe. The shorter pipe will be the barrel and the long one is the air chamber. The deal is, I made 2 mortars. One has a longer barrel so that one has a smaller spread. The one with the shorter barrel, on the other hand, has a larger spread of bullets. The smaller one is lighter and easier to carry, so I prefer it in an actual airsoft war.
Step 3: Firing It
Shooting the mortar is simple.(i named mine Lucy) First, close the valve and use a bicycle pump to pump the back chamber to at least 110 psi for best results. Then, put uno (one) 40 millimeter ping pong ball in the front chamber. Drop a hand-full of airsoft BBs in after.Open the ball valve and hear the satisfying pop of air. The ping pong ball will propel the BBs out of the front chamber.
Step 4: Upgrades
DUCT TAPE A SLING ON! It helps so much!
Grease the tripod.(unnecessary) This lets me deploy the mortar in about 20 seconds or so.
Spray-paint it to camo with surroundings.
Follow me on Instructables!(This step is necessary)
Attach an air tank to get more shots before pumping the pressure up again.
note- If you have a team and need more firepower, make this. I made 2 for my team and use them to blast up the enemy's base or fort.
74 Comments
7 years ago
Can you use this over your shoulder, like an RPG?
Reply 8 months ago
As long as the bbs dont fall out
6 years ago
How far do these shoot
Reply 8 months ago
Around 200 feet
Question 3 years ago
How do you mount the tripod on?
Answer 8 months ago
He used duct-tape
Question 8 months ago
Do the ping-pong balls fly out with the bbs?
8 months ago on Introduction
Im taking this as a cannon for my tank
1 year ago
I have plans for my next airsoft battle. Mwah ha ha ha ha ha!!!
Question 2 years ago
what do you recomend for compressed air?
9 years ago on Introduction
It works like an RPG if you just put tissue paper over the end of the barrel and then secure the paper on with a tight rubber band.
Reply 7 years ago
I'm sorry if this may sound dumb, but how does it work?
Reply 2 years ago
i know youve probably moved on in 5 years, but the paper stops both the air and ball from going out, especaly when at a 90° angle. then since the ping pong ball's curcumfrence is less than the inside of the pvc pipe, it shoots off the paper and elastic band, increaseing the balls fps. this would also work in fields whare people woundnt like large ping pong balls (as they were just a way for the mortar's pellats to all reach the same target, making it just like a real mortar). so if just shot raw bb's out of it, making it like a shotgun that fired 100's of bb's. but the bb price would be more expenceive than the gun, lol
Reply 2 years ago
i would like to imagine it makes a nice thwump noise
Reply 6 years ago
how does the RPG work?
Reply 9 years ago on Introduction
i never thought of that
Question 2 years ago
Could a spring be put in place of a pressure pump?
Question 2 years ago
I've been thinking about building a paintball mortar would this concept work the same?
Tip 3 years ago
It's better to use pvc cement without the primer. A link to a study with data is posted below. I use two similar cannons in my classroom to teach optimal angle (45 degrees).
https://www.plumbingsupply.com/the-great-pvc-primer-debate.html
6 years ago
Instead of changing the angle of each shot to get a different range could you change the psi and just keep the angle at 45 degrees? So each time you load it you could have like a cheat sheet of what psi gets to what range.