Small Bore Airsoft Rifle S.B.A.R.

Kobl · Thu Jul 17, 2008 1:56 pm

So here it is. I got the first parts a couple months ago then lost interest in building cannons, but recently I became interested again.

This gun shoots like a dream, killed a shaken up seltzer can at 20 psi and is capable of at least 400. The power will increase once I get another 1-2 feet of barrel on there too.

At the moment I'm using a cast hot-glue piston but will be switching to cast epoxy soon (its drying).

I'll get internal shots when I put in the new piston.

Pics:

<a href="http://s184.photobucket.com/albums/x58/ ... G_1882.jpg" target="_blank"><img src="http://i184.photobucket.com/albums/x58/ ... G_1882.jpg" border="0" alt="Photobucket"></a>

<a href="http://s184.photobucket.com/albums/x58/ ... G_1883.jpg" target="_blank"><img src="http://i184.photobucket.com/albums/x58/ ... G_1883.jpg" border="0" alt="Photobucket"></a>

<a href="http://s184.photobucket.com/albums/x58/ ... G_1884.jpg" target="_blank"><img src="http://i184.photobucket.com/albums/x58/ ... G_1884.jpg" border="0" alt="Photobucket"></a>

<a href="http://s184.photobucket.com/albums/x58/ ... G_1891.jpg" target="_blank"><img src="http://i184.photobucket.com/albums/x58/ ... G_1891.jpg" border="0" alt="Photobucket"></a>

blind909 · Thu Jul 17, 2008 2:17 pm

Nice gun, is it all 1/2 inch or 1/4 inch?, all it needs now is a stock, and a painjob, and it would be AWSOME.

Kobl · Thu Jul 17, 2008 2:20 pm

1/2 inch, and I didn't have it mounted in the first couple pictures, but I have a shock pump hose clamped to the barrel for portable ass-kicking.

blind909 · Thu Jul 17, 2008 2:24 pm

OK, and are you going to add a stock? And dont go anywhere over 150 psi, because of your blowgun pilot valve, if you want to take it to its full potential, replace the blowgun with a 1/4 inch ball valve.

Sticky_Tape · Thu Jul 17, 2008 2:26 pm

looks good except portable ass kicking against a aeg is unlikely olny at long range.

Kobl · Thu Jul 17, 2008 2:50 pm

I have no worries about the blowgun, I did have a 1/4" ball valve on it though, and I couldn't hit shit. The blowgun is the only ergonomic option.

potatoflinger · Thu Jul 17, 2008 4:03 pm

The blowgun should be fine, I use them at 200 PSI very frequently.

Great plinker you got there

Spuddin · Thu Jul 17, 2008 4:17 pm

nice little powerhouse u got there, would love to see it shoot a ball bearing at something for penetration purposes. this makes me interested in building a all metal piston gun, someday

Hotwired · Thu Jul 17, 2008 4:40 pm

potatoflinger wrote:The blowgun should be fine

I use them at 400 PSI very infrequently

The model I'm using is slightly different but in the same shiny-silver-basic-blowgun-with-red-rubber-handle category.

The plinker looks good, only question I have is... is your piston really almost the length of your chamber?

Kobl · Thu Jul 17, 2008 4:43 pm

No, it occupies about three quarters of the space of the shiny chrome nipple. The rest is dead space

.

Sticky_Tape · Thu Jul 17, 2008 5:19 pm

as most people will say D/4

Kobl · Fri Jul 18, 2008 5:49 pm

What exactly is this D/4 thing I keep hearing about?

Hotwired · Fri Jul 18, 2008 7:54 pm

The piston only needs to move back 1/4 of the internal diameter of the tube it's sealing on to achieve full flow.

There are a few other issues that need to be taken into account if you want full flow but that is what d/4 means.

rhyce · Sat Jul 19, 2008 5:31 am

i love this gun and it makes me want to build one.....so bad.
If you were too put a schrader valve on it were would you do so?

Kobl · Sun Jul 20, 2008 3:42 pm

It has a shrader valve...

On the epoxy piston front the pseudo epoxy I used (check out my mini piston valve thread) sucks balls. I've left it curing for 2 1/2 days and its still wet.

Does anyone have a good online source for epoxy resin?

Small Bore Airsoft Rifle S.B.A.R.

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