300-600psi piston valved pneumatic.
Posted: Sun Feb 27, 2011 3:21 pm
This is a gun I have had for quite some time but I haven't posted it yet.
Enough small talk;
Barrel: 90cm of 5mm ID brass tube for pellets and small slugs.
Barrel2: 100cm of 4mm ID brass tube that is sleeved inside the bigger barrel to fit the breech.
Valve: Barrel sealing Tee housed piston valve.
Chamber: 1/2" stainless steel coupling with other fittings seen in the pictures.
Pressure gauge: Argon regulator tank pressure gauge, it measures from 0-315bar (about 4600PSI) However it's accuracy is disputable at such low pressure. It tells me 30bar but I think it is higher, I may be wrong.
Pilot: 3/8" ball valve, I want to make a push button valve but I am still puzzling with designs.
Filling: Shock pump, hopefully fridge compressor in the near future.
This gun has been used alot lately, and I like it very much.
It has a solid stainless steel piston made from a umbraco screw head housed in a bored out 3/8" pipe nipple that seals against a brass seat.
The OD of the seat/breech pipe is 8mm and it is soldered into a 1/4" brass nipple. The pipe was bored out to 6.5mm to fit my barrel, however the boring is just a inch deep so it wont touch the piston.
There really isn't much more to it, I made it from spare parts so I had something to use my pump on.
I think it has a decent velocity (Not measured) since it can blast cola cans right open and make apples go good bye with airgun pellets.
Some pics:
Breech assembled. I will make a locking mechanism when I get a good trigger.
Chamber and valve.
Pressure gauge.
Gun and pump, best friends.
Apple shot at (gauge says) 30bar with a pellet.
Apple puzzled together and a cola can that was filled with water with same ammo and pressure.
Closeup of entrance hole.
Vids:
[youtube][/youtube]
[youtube][/youtube]
Note that I just put the gauge on and the earlier shots was at guessed pressure.
The apple and cola can was with gauge.
Ask if there is something you wonder about
Enough small talk;
Barrel: 90cm of 5mm ID brass tube for pellets and small slugs.
Barrel2: 100cm of 4mm ID brass tube that is sleeved inside the bigger barrel to fit the breech.
Valve: Barrel sealing Tee housed piston valve.
Chamber: 1/2" stainless steel coupling with other fittings seen in the pictures.
Pressure gauge: Argon regulator tank pressure gauge, it measures from 0-315bar (about 4600PSI) However it's accuracy is disputable at such low pressure. It tells me 30bar but I think it is higher, I may be wrong.
Pilot: 3/8" ball valve, I want to make a push button valve but I am still puzzling with designs.
Filling: Shock pump, hopefully fridge compressor in the near future.
This gun has been used alot lately, and I like it very much.
It has a solid stainless steel piston made from a umbraco screw head housed in a bored out 3/8" pipe nipple that seals against a brass seat.
The OD of the seat/breech pipe is 8mm and it is soldered into a 1/4" brass nipple. The pipe was bored out to 6.5mm to fit my barrel, however the boring is just a inch deep so it wont touch the piston.
There really isn't much more to it, I made it from spare parts so I had something to use my pump on.
I think it has a decent velocity (Not measured) since it can blast cola cans right open and make apples go good bye with airgun pellets.
Some pics:
Breech assembled. I will make a locking mechanism when I get a good trigger.
Chamber and valve.
Pressure gauge.
Gun and pump, best friends.
Apple shot at (gauge says) 30bar with a pellet.
Apple puzzled together and a cola can that was filled with water with same ammo and pressure.
Closeup of entrance hole.
Vids:
[youtube][/youtube]
[youtube][/youtube]
Note that I just put the gauge on and the earlier shots was at guessed pressure.
The apple and cola can was with gauge.
Ask if there is something you wonder about