homemade airsoft rifle

[flashskate13]

Hello,

I'm new here, after I finish my slingshot rifle I need a new project and come across wyz2285 videos on YouTube of he's airsoft rifle, so I done more searching I now no I need a qev and 3 way valve found these on eBay but are they right for the job?

http://www.ebay.co.uk/itm/380537985051? ... 1423.l2649

http://www.ebay.co.uk/itm/360532633739? ... 1423.l2649

And what I am trying to get my head around is the setup.

Gas tank to regulator to ????
Or use full links

Hope someone can help
Rick

[flashskate13]

Also found this qev

http://www.ebay.co.uk/itm/360537518850? ... 1423.l2649

Will be to firer 6mm metal bearings

[jackssmirkingrevenge]

Have a look here for a more detailed explanation of the setup: http://www.spudfiles.com/forums/semi-au ... 23626.html

[flashskate13]

Hi,

Thanks for the link much appreciated cleared a lot of questions I would have asked.

Now to get parts.

[flashskate13]

This is What I want it to look like,


Not sure on making it out of aluminium and stainless steel or fibreglass and carbon fibre.

[flashskate13]

Also I need to workout chamber size.

To firer .25g bb
And where I go has a 450fps limit on bolt action rifles

Thanks
Rick

[jackssmirkingrevenge]

Anti materiel rifles usually aren't that difficult to model given their function driven shape.

Have a look at the Leader 50: http://olegvolk.net/blog/2012/01/07/jus ... the-range/

The body is basically an aluminum extrusion.

[flashskate13]

Thanks for the link it is a pretty simple design for a rifle. And not a overly big rifle.

I like bullpup style rifles just waiting on my pneumatic parts to be delivered so I can get a ruff idea of dimensions

Just designing a bolt for it now shouldn't be to hard only has to travel just over 6 mm

[flashskate13]

Thanks for the link it is a pretty simple design for a rifle. And not a overly big rifle.

I like bullpup style rifles just waiting on my pneumatic parts to be delivered so I can get a ruff idea of dimensions

Just designing a bolt for it now shouldn't be to hard only has to travel just over 6 mm

[flashskate13]

Also this is the qev I brought,
But the listing tells me its 1/4 but the measurements in the pic make no sense!

Ideally I want to reduce the exhaust port but don't know the size 18mm is 45/64 or is it meant to be 5/8?

[jackssmirkingrevenge]

Yeah, the thread sizes are pretty weird. I'm guessing the 18mm dimension is actually 1/2" BSP.

[flashskate13]

Yeah they are abit odd.

how do I work out chamber size?

[flashskate13]

Because of it being a bull pup design if I have the qev at the front of the rifle and lead 6mm pipe from qev to the back of the rifle would there be a problem as it would reduce pressure behind the bb?

[flashskate13]

OK so done a bit of searching last night and come across this.

http://www.ukmonsters.co.uk/dsr1/dsr1.htm

And a video on YouTube.

http://www.youtube.com/watch?v=EqCAc16rZwk

Now that's a build I want to achieve.

[jackssmirkingrevenge]

The guy is pretty well known in airsoft, bit hard to replicate his results without proper machine tools though. I think what you should be aspiring to is this guy: http://www.thefirearmblog.com/blog/2012 ... -scissors/