For anyone interested, I have been working on this project, but nothing besides mockup shells and bolt heads physically exist yet. I'm hoping to 3d print a scale prototype this weekend.

I think I'm going to move to a 3/4" QEV in an effort to keep more the receiver more intact and clean looking. My ...

I cannot.
I can give you the resource of
https://www.engineeringtoolbox.com/pvc- ... d_795.html
which is where I got the sizes of the modeled PVC; their sizes have been accurate to the examples I have. If you have questions, feel free to message me.

This is a design for a bolt-action, shell ejection nerf anti-tank rifle.
Basically, I want a homemade Barrett, and I'm using my airsoft hobby as justification.
The bolt face is based on boltsniper's FAR, the shells are 6" long,the dia of shells and barrel is 1.5". The bolt travels 8.5".
Ammo is ...

Hello, new to the site, but I've built a couple cannons before. Here's one: A breech-loading turret mounted cannon.
https://s17.postimg.org/cjz96avun/SAM_4406.jpg

Here's my newest project - I have a new idea that has some pretty specific requirements. I won't go into the "why" yet, keeping ...