Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 48 users online :: 5 registered, 0 hidden and 43 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Optom mini shot

Built a BB Machine Gun? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
Sponsored 
  • Author
    Message

Optom mini shot

Unread postAuthor: shud_b_rite » Mon Feb 26, 2007 2:34 am

This is my first cannon I have posted on this website, I thought that after asking so many questions on this website I should actually post something useful. So I present you with Optom mini shot (well hey ya gotta call it something)

This is incredibly simple, it is made using:
Shrader valve
Air compressor tire inflater with gauge
60 bar rated pressure hose
Air compressor male and female quick connect fittings.
2 hose clamps
The barrel is from a $11 weed sprayer (thanks to MrCrowley for the idea, works great)

Like I said it is incredibly simple. The blue hose acts as a small chamber which can be filled to 70psi with 5 pumps using a foot pump or simply connect it to an air compressor. I am pleased with the performance of the tire inflater, the gauge on it is very accurate, it is rated to 12bar and has reasonable air flow. I made a poor harder breach loader using a plastic straw I got from the weed sprayer to cover the hole.

I have been shooting plastic bb's at 70psi through several layers of cardboard up close (wear eye protection) as accuracy with plastic bb's isn't to great. I will get some ball bearings or steel pellets and try them out. I also hope to get a 220psi 12v compressor to take it to the next level because my crappy foot pump says it can pump to 125psi but I cant get any higher than 72.

But yea anyways, I reckon its not too bad for what its worth (about $20 and still have leftover parts). Once I figured out how I was gonna do it it took me about 10mins to put together.
  • 0

Attachments
loader.jpg
My poor harder breach loader
close.jpg
The stuff that makes it tick
gun.jpg
The gun
Last edited by shud_b_rite on Tue Feb 27, 2007 10:58 pm, edited 1 time in total.
Airbeds... so many different uses
User avatar
shud_b_rite
1st Lieutenant
1st Lieutenant
 
Posts: 290
Joined: Tue Jan 30, 2007 7:10 pm
Location: Auckland, New Zealand
Reputation: 0

Unread postAuthor: experament-u2 » Mon Feb 26, 2007 3:25 am

it looks awsome anychance of damage pics

i to have used the neck of a weed sprayer for a barrel
  • 0

User avatar
experament-u2
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 469
Joined: Tue Dec 26, 2006 11:18 pm
Reputation: 0

Unread postAuthor: shud_b_rite » Mon Feb 26, 2007 3:35 am

Yea I'll do some 2moro and I'll see if i can get some steel pellets too.
  • 0

Airbeds... so many different uses
User avatar
shud_b_rite
1st Lieutenant
1st Lieutenant
 
Posts: 290
Joined: Tue Jan 30, 2007 7:10 pm
Location: Auckland, New Zealand
Reputation: 0

Unread postAuthor: Mr.Russ » Mon Feb 26, 2007 5:36 am

the trigger looks a bit weird...

but other then that good gun!
ever thought about mounting like a mini pump on the side of it?
  • 0

User avatar
Mr.Russ
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 429
Joined: Fri Jan 26, 2007 9:07 pm
Reputation: 0

Unread postAuthor: Hotwired » Mon Feb 26, 2007 5:41 am

Definitely a new design :wink:

Why didn't you mount the barrel and hose the other way round? The trigger would then pull back instead of upwards.
  • 0

User avatar
Hotwired
Lieutenant General
Lieutenant General
 
Posts: 2599
Joined: Fri Oct 13, 2006 5:51 am
Location: UK
Reputation: 0

Unread postAuthor: shud_b_rite » Mon Feb 26, 2007 1:44 pm

If i did that then the gauge would be useless, it only measures pressure using the setup that I have. Anyway I have actually thought about buying a 300psi shock pump which should work very well because it is a very small chamber. But until now I will just keep the chamber in a coil
  • 0

Airbeds... so many different uses
User avatar
shud_b_rite
1st Lieutenant
1st Lieutenant
 
Posts: 290
Joined: Tue Jan 30, 2007 7:10 pm
Location: Auckland, New Zealand
Reputation: 0

Unread postAuthor: iknowmy3tables » Mon Feb 26, 2007 3:03 pm

watch out for those cheapo 12v compersers that claim to have 220psi or so, I bought one for $9 and the thing breaks before it even reaches 60psi or so, but this was for a larger gun but it might work for this gun, since the chamber takes so short to fill,

if you get one you will have to wait like 10-15 friggin minutes between uses too let it cool its getto chinese engineered @$$, and you cant let run or remain conected for more than 2mins or somthing, a good one will probably cost you twice as much
  • 0


iknowmy3tables
Major General
Major General
 
Posts: 1558
Joined: Fri Dec 15, 2006 3:57 pm
Location: maryland
Country: United States (us)
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: shud_b_rite » Tue Feb 27, 2007 12:44 am

My crappy foot pump has just crapped out on me so those damage pics will have to wait a week or 2 until I get a new pump. Its not that much of a disappointment though, shooting through 2 layers of cardboard with plastic bb's isn't that great.
  • 0

Airbeds... so many different uses
User avatar
shud_b_rite
1st Lieutenant
1st Lieutenant
 
Posts: 290
Joined: Tue Jan 30, 2007 7:10 pm
Location: Auckland, New Zealand
Reputation: 0

Unread postAuthor: subterranean » Wed Mar 07, 2007 11:29 pm

i like the gun. i really want to make a breach loading system like yours for my next bbgun. what type of tube is the barrel and the sleeve and does this method work well?
  • 0

User avatar
subterranean
Master Sergeant
Master Sergeant
 
Posts: 171
Joined: Sat Oct 21, 2006 11:39 am
Location: columbus, ohio
Reputation: 0

Unread postAuthor: shud_b_rite » Thu Mar 08, 2007 1:50 pm

The barrel is aluminum i think, about 6.5 mm from a weed sprayer. What you cant see in the photo is the blu-tak that is used to seal around the barrel and the tire inflater. The gun works reasonably well, would work even better with metal bb's.

And also the tire inflator I used is meant for 90psi but it is rated up to 100psi. So when I pump it up to 100psi it leaks down to 90psi which is kind of stink.

The breech loader is nothing special, just a hole covered by a plastic straw. I made it thinking that I could build some kind of magazine to hold the bb's and turn it into an automatic.

If your gonna build a gun like this I would use a slightly larger chamber (not longer, larger) , and instead of using a dust gun or tire inflater, buy one of those super powerful sand blasters to use as a trigger or a sprinkler valve. While making this gun I discovered that it is important to have a fast opening time because even a small amount of air will push a bb straight out of the barrel.
  • 0

Airbeds... so many different uses
User avatar
shud_b_rite
1st Lieutenant
1st Lieutenant
 
Posts: 290
Joined: Tue Jan 30, 2007 7:10 pm
Location: Auckland, New Zealand
Reputation: 0

Unread postAuthor: subterranean » Thu Mar 08, 2007 3:41 pm

Are you saying that the barrel is not threaded onto the tire inflator? is it just glued?
  • 0

User avatar
subterranean
Master Sergeant
Master Sergeant
 
Posts: 171
Joined: Sat Oct 21, 2006 11:39 am
Location: columbus, ohio
Reputation: 0

Unread postAuthor: zeigs spud » Thu Mar 08, 2007 5:07 pm

no. the i is connected to a male thread and the male thread connects into the tire inflator from what i can see. i sugest a hopper next time u make one. it makes much more rapid fire and has a great spouting sound that all love to hear lol. :D
  • 0

User avatar
zeigs spud
Colonel
Colonel
 
Posts: 657
Joined: Tue Apr 04, 2006 10:39 pm
Reputation: 0

Unread postAuthor: subterranean » Thu Mar 08, 2007 5:09 pm

does any one have any good methods of holding airsoft bbs in the barrel.
  • 0

User avatar
subterranean
Master Sergeant
Master Sergeant
 
Posts: 171
Joined: Sat Oct 21, 2006 11:39 am
Location: columbus, ohio
Reputation: 0

Unread postAuthor: zeigs spud » Thu Mar 08, 2007 5:19 pm

heres an idea...i liek the second better


you have to click on it for the whole thing or it will be chicken scratch lol


Image
  • 0

User avatar
zeigs spud
Colonel
Colonel
 
Posts: 657
Joined: Tue Apr 04, 2006 10:39 pm
Reputation: 0

Unread postAuthor: shud_b_rite » Thu Mar 08, 2007 9:44 pm

Zeigs spud is right. The chamber has a quick connect for an aircompressor that fits into the tire inflater. And the barrel fits firmly into the hole on the tire inflator and just has a bit of blu-tak to seal it.
  • 0

Airbeds... so many different uses
User avatar
shud_b_rite
1st Lieutenant
1st Lieutenant
 
Posts: 290
Joined: Tue Jan 30, 2007 7:10 pm
Location: Auckland, New Zealand
Reputation: 0

Next

Return to BB/Airsoft/Pellet Gun Database

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'