.50" QEV gun *New stock, almost finished*

[zy]

Just dropping by to inspire fellow spudders with this newly built QEV gun.
Hope you will enjoy it.

Info

1/2" QEV.
Pilot valve: modified blowgun (original didn`t take pressure over ~10 bar, and too low airflow).
.50" barrel, 57cm long (22 inch).
Wooden stock with adjustable length.
Scope is a cheap 3~9X40 GD from Dealextreme.
Pump: fork-pump that can handle 450psi/31bar.
Operating pressure: I actually dont know myself because the manometer on the fork-pump is somewhat... bad. When my compressor shows 9 bar, this show about 5 bar . But I take it too ~10 bar, so maybe 15 bar`ich?
It is probably calibrated to show accurate measurements @ 30 bar.


The gun is easily taken apart without tools for transportation etc.

Next project will be a semi-auto bullpup design with a 1/2" T-valve actuated by a electromagnet (coil + magnetic piston). But it will probably take a while to build, if I ever complete it... Well, that is another story.



Peace

[jackssmirkingrevenge]

Very nicely put together, in a quaint sort of way must take a bit of effort to get it up to pressure though as the chamber seems relatively large, you would have been better off with a smaller chamber and higher pressure.

The stock is particularly well finished, what wood is it?

[Lockednloaded]

that stock is amazing, but the gun looks kind of dangly next to it. I recommend a wooden support

[jackssmirkingrevenge]

You might want to try sleeving the barrel as suggested here, it would look less skinny plus you'd have the benefit of an integral silencer

[zy]

Very nicely put together, in a quaint sort of way must take a bit of effort to get it up to pressure though as the chamber seems relatively large, you would have been better off with a smaller chamber and higher pressure.

The stock is particularly well finished, what wood is it?

Aaa forget, the chamber is about 110cc. Yeah it take 200 pumps to ~15 bar (bad manometer...). The problem is that I am a coward, the QEV`s max pressure is 12 bar, and I have no idea how much punishment it can take... So I am on the safe side .

[zy]

that stock is amazing, but the gun looks kind of dangly next to it. I recommend a wooden support

It is actually very stable

[zy]

You might want to try sleeving the barrel as suggested here, it would look less skinny plus you'd have the benefit of an integral silencer

Hehe yeah, maybe I do, someday. But Im satisfied with the looks, or, I dont care so much for the looks. as long as it works, Im fine hehe.

[spudtyrrant]

The problem is that I am a coward, the QEV`s max pressure is 12 bar, and I have no idea how much punishment it can take... So I am on the safe side .

i personally have taken them to 30 bar, some people on this forum have taken them as far as 60 bar, multiple times without failure

[c11man]

ive been to 45, who takes theres to 60?

[zy]

The problem is that I am a coward, the QEV`s max pressure is 12 bar, and I have no idea how much punishment it can take... So I am on the safe side .

i personally have taken them to 30 bar, some people on this forum have taken them as far as 60 bar, multiple times without failure

Oh... thats... sick.... . Well, maybe 20 bar wouldnt be so bad?

[zy]

You might want to try sleeving the barrel as suggested here, it would look less skinny plus you'd have the benefit of an integral silencer

God dammit now Im sleeving it ... Had some pvc-pipe laying around, but Im out of paint so it will look shitty until I get some new paint.

[spudtyrrant]

ive been to 45, who takes theres to 60?

jeepkahn in the decimator, and maggotman(not the best example lol)

[jackssmirkingrevenge]

Gosh darnit now Im sleeving it

If you're going to increase the pressure, you'll need the extra suppression

[jakethebeast]

hey that looks cool


this is offtopic but i just dont want to make a new topic out of this: if i had a barrel sealing piston valve with spring behind the piston, would it be semi-automatic if i pilot it with small qev? if so, do the small qev need to have a spring?

[jackssmirkingrevenge]

if i had a barrel sealing piston valve with spring behind the piston, would it be semi-automatic if i pilot it with small qev?

yes

if so, do the small qev need to have a spring?

no