Airsoft M72 LAW rocket launcher

Step 7: Assembling the outer tube and inner tube together

REMOVE the ABS/PVC pipe from inside the fiberglass tube.

Decide how much travel you want the inside tube to have when you extended your LAW launcher. I decided for mine it would be a 5 inch travel.

I marked five inches on the side of the fiberglass tube. Make sure the two points are parallel to the lenght of the tube.

Make sure to remove the abs/pvc pipe.

Drill out the marks.

Draw a line between the hole you just drilled in the fiberglass and cut out a channel with a dremel tool. Watch out for fiberglass dust. it itches and you should not get it in your eyes or breath it. Wear long sleeves, goggles and a mask.

Picture #3: Insert the ABS/PVC pipe back in the fiberglass tube with the COUPLER ATTACHED. Drill a hole in the ABS pipe at the front portion of the channel you just dremeled out.

Picture #4: Put a screw in the hole. Now the pipe will only move forward and backward a predetermined amount (mine is 5 inch travel)and the inside tube will not rotate.

Comments

[thisishaggard]

Building one as we speak, this is like 3 years in the making. I'll post a video once I'm done. Basically building to the schematics of this instructables, with a few minor differences. I'm using very similar parts, with the exception of a few, namely the grenade, and the shielded coupler. I realize that what you have posted are the exact specifications for a product that will 100% work, though, being unable to acquire such items was difficult, as I am in Canada. I have a fair understanding of all the parts and realize that essentially you're just looking for a rear-load green gas grenade, and a shielded coupler which reduces from 2inches to 1.5 inches. If you are looking to make an airsoft grenade launcher:
1. For a reasonable price
2. That doesn't look like plumbing parts
3. That is easily made within a week
4. That will rival any $1000 launcher on the market
5. Can be used on virtually any airsoft field
6. Will not be turned down for use, as all potato guns are (even though they may be the most high-tech thing out there)
And probably the most important part of this instructable, as all instructables by MrTinkerer:
7. Sticks to the best principal - KISS: Keep It Simple Stupid.
I have spent countless hours on the internet looking for a product that even rivals this, that is home made, for under $120.. Needless to say, there isn't anything close. Stick with this instructable, and be smart about it. If you read the directions one by one, carefully, as well as the comments, you will find literally EVERY answer you may have a question to. Even if you're a novice, this makes sense. Basically you could take the coupler, the grenade, and a piece of ABS or PVC and depress the trigger on the grenade with your finger, and you would have the most basic form of this weapon. The fiberglass as well as the externals are not required to make this weapon work. It just makes it much more functional.
Thank you MrTinkerer, you are a god among men. No joke.
I am going to school to be a gunsmith and machinist technician so I can start building my own guns, and eventually open the most bomb airsoft facility ever. I'm talking downed heli's, airplanes, indoor CQB, and outdoor scenario play. I have ideas to host a apocalypse day/week/month every year around halloween, where players will set out, and zombie-costumed staff by the 100's will attack unsuspecting players through ambush and surprise. Think COD and Battlefield maps, only real life. That being said, if and when I get my business up and running, I would love to work along side for your expertise and innovative standards in everything you do. Very impressed to say the least.

[MrTinkerer]

Wow! so much flattery in the comment above. you are too kind. thanks. but, humbly, i am just a guy who likes to make stuff, nothing more....
I am very much looking forward to seeing your launcher. Please send me a youtube link when you are done.

[gnazaire]

Is there any substitute to fiber glass???

[MrTinkerer]

carbon fiber

[theRx]

If we wanted to go for carbon fiber, what would you recommend? Multiple layers like you did with the fiber glass? Single layer with a thicker sheet? I understand that using the fiber will probably make the build more expensive no matter what, but I'm just trying to minimize cost while making the outer tube (hopefully) more durable.

[MrTinkerer]

Fiberglass will be significantly less expensive even if you did 5-6 layers. Fiberglass is very strong even with 2 layers.

[DELETED_tinovw]

(removed by author or community request)

[MrTinkerer]

8oz fiberglass is fine. I chose fiberglass because i needed to fabricate a strong, snug, outer tube.