BFG #7

Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
User avatar
farcticox1
Sergeant
Sergeant
Posts: 1078
Joined: Sun Mar 31, 2013 12:37 pm
Has thanked: 68 times
Been thanked: 94 times

Sun May 07, 2017 9:47 am

That's right, you know it

http://www.spudfiles.com/airsoft-pellet ... 26444.html

Time to call it finished, compressed air (135 psi) powered, 10mm ball bearing ammo, semi automatic, magazine holds 10 + 1 in ready. The stock is the chamber (1 1/2" pvc), barrel is 1/2" OD seamless stainless tubing (10.2mm ID) 700mm long. Main valve (3/8) is controlled by pilot valve (1/8) pulse, this pulse can be adjusted by the air restrictor to give different times/power. Valves are pilot air actuated 5/2 spring return, but had to add external pilot air to main valve as I was feeding it through an exhaust port not the P port. :shock:
Mostly made from scrap aluminium/stainless/pvc, about 200hrs+ work, hand tools and a drill press only, couple of the fittings were Tig welded, but only because I didn't want to buy anything for it. Front grip is a grinder handle :idea:
It is 1070mm/42" overall length, 6.4kg/14lbs in weight.
1.jpg
2.jpg
3.jpg
air lines.jpg
Last edited by farcticox1 on Sat Aug 05, 2017 2:42 pm, edited 2 times in total.
hectmarr
Sergeant
Sergeant
Argentina
Posts: 1059
Joined: Sat May 07, 2016 3:49 pm
Location: Argentina
Has thanked: 266 times
Been thanked: 268 times
Contact:

Mon May 08, 2017 10:42 am

A weapon's beauty! Does it work with Co2? I have in mind to make something similar semi-self. I have a "mockup" although the system I'm using is different. Great job, congratulations !! :bounce:
WizardNoodle
Private 3
Private 3
Posts: 56
Joined: Fri Feb 24, 2017 10:13 pm
Has thanked: 1 time

Mon May 08, 2017 2:01 pm

Awesome. What speeds and/or penetrating power do you get?
Penetration is key
User avatar
farcticox1
Sergeant
Sergeant
Posts: 1078
Joined: Sun Mar 31, 2013 12:37 pm
Has thanked: 68 times
Been thanked: 94 times

Mon May 08, 2017 5:35 pm

I think Co2 would work just fine, would be portable with a regulated bottle. :idea:

Have only fired it at short range, but will go through 1/2" plywood at 14 feet. :shock:
User avatar
Xamllew
Private 4
Private 4
Posts: 98
Joined: Sun Aug 21, 2016 11:00 pm
Location: Belgrade
Has thanked: 2 times
Been thanked: 4 times

Tue May 09, 2017 2:09 am

Honestly this beast makes me think of some sort of experimental german rail gun with all the bright steel. The machine-work is on another level as far as what I've seen around here. Just love the design of that bb magazine and the follower.
User avatar
farcticox1
Sergeant
Sergeant
Posts: 1078
Joined: Sun Mar 31, 2013 12:37 pm
Has thanked: 68 times
Been thanked: 94 times

Sat Aug 05, 2017 1:50 pm

Adding some construction pictures cause I'm adding this link to Youtube. Also adding a video :D

[youtube][/youtube]
001.jpg
002.jpg
003.jpg
004.jpg
005.jpg
006.jpg
007.jpg
008.jpg
009.jpg
010.jpg
011.jpg
012.jpg
013.jpg
014.jpg
015.jpg
016.jpg
017.jpg
018.jpg
019.jpg
020.jpg
021.jpg
022.jpg
hectmarr
Sergeant
Sergeant
Argentina
Posts: 1059
Joined: Sat May 07, 2016 3:49 pm
Location: Argentina
Has thanked: 266 times
Been thanked: 268 times
Contact:

Sat Aug 05, 2017 7:25 pm

:bounce: He fires his weapon beautifully, and the precision he has is good. I like it. :bounce:
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 26183
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 547 times
Been thanked: 326 times

Donating Members

Sun Aug 06, 2017 6:18 am

I love it, especially that magazine feed that is simultaneously elegantly simple while unnecessarily complicated :D kudos!
hectmarr wrote:You have to make many weapons, because this field is long and short life
User avatar
farcticox1
Sergeant
Sergeant
Posts: 1078
Joined: Sun Mar 31, 2013 12:37 pm
Has thanked: 68 times
Been thanked: 94 times

Sun Aug 06, 2017 6:26 am

Still not sure about the bipod, I think it needs to pivot slightly, might work on that today. :idea:

That was easy, removed locknut and did a bit of filing to let it swing
bipod mod (1).jpg
bipod mod (2).jpg
Max swing left or right
bipod mod (3).jpg
User avatar
farcticox1
Sergeant
Sergeant
Posts: 1078
Joined: Sun Mar 31, 2013 12:37 pm
Has thanked: 68 times
Been thanked: 94 times

Sun Nov 05, 2017 3:22 pm

Got the BFG out and gave it a Xmas paint job, brown grips and black barrel now 8)
paint.jpg
Air2theBrain
Specialist 2
Specialist 2
Posts: 222
Joined: Wed Apr 12, 2017 5:30 am

Wed Nov 15, 2017 4:16 am

Wow! 8)

Such a clean professional build, i noticed there is no qev but a pilot valve?
What are they like compared to a qev?

Love the workmanship, great inspiration thank you. :)
User avatar
farcticox1
Sergeant
Sergeant
Posts: 1078
Joined: Sun Mar 31, 2013 12:37 pm
Has thanked: 68 times
Been thanked: 94 times

Wed Nov 15, 2017 5:35 am

BFG uses a 3/8 air pilot valve about the same flow as a 1/4" QEV, it is a lot more bulky, I mainly used it because I already had it :o

This is my first QEV attempt, 3/8" chineasiem one of Ebay.
20170802_175930.jpg
User avatar
farcticox1
Sergeant
Sergeant
Posts: 1078
Joined: Sun Mar 31, 2013 12:37 pm
Has thanked: 68 times
Been thanked: 94 times

Sun Jan 28, 2018 2:38 pm

Finished the removable magazine :D
mag2 (3).jpg
It hooks onto a pin at the front then pivots in and locks
mag2 (4).jpg
mag2 (5).jpg
mag2 (6).jpg
mag2 (7).jpg
New charge handle and shut off for loading cylinder to make it single shot
mag2 (8).jpg
Now it's much slimmer with the magazine off
mag2 (2).jpg
And I can check to see if it is loaded or not :D
mag2 (1).jpg
Air2theBrain
Specialist 2
Specialist 2
Posts: 222
Joined: Wed Apr 12, 2017 5:30 am

Sun Jan 28, 2018 6:51 pm

Just awesome. :shock: 8)

Looks fantastic well done F1.
User avatar
farcticox1
Sergeant
Sergeant
Posts: 1078
Joined: Sun Mar 31, 2013 12:37 pm
Has thanked: 68 times
Been thanked: 94 times

Mon Feb 05, 2018 6:51 pm

Sporting the new folding bipod 8)
bipod (1).jpg
bipod (2).jpg
Post Reply