Others Boss modified for STX barrels

[SpindleB]

Was able to retap the 1/8 BSP to M10x1.0 and put the manometer in with high pressure threadlock. Seals up, no leaks, at that location. Not sure if there are long term issues there but I will deal with that in the future.

But in the process of getting the manometer to seal (before i retapped) I think i got some detritus in the poppet valve. Leaking out the barrel. I have spares so I will let it bleed down and try polishing the poppet and seat and if needed changed the poppet.

Well, this has been an adventure.
Ordered new poppet and valve seat(s) and various small parts I will drop and lose.
Turns out the valve seat can be installed backwards. Helps to look at the drawings.
That took a while to get all sealed up.

Reassembled everything but then it wouldn't cock. Spent a week off and on trying to get the whole trigger assembly figured out. Turns out the previous owner had installed 3x3mm screws and they should be 3x4mn. Finally got it all working.

Then it starts leaking around the screw that holds the poppet valve in place. Of course it is the oring. Of course it is an oddball FX size 9.3x2.4mm 90 duro. So wait for more parts, again. Got the parts, sitting in the corner in leak test.

The FX Boss Slug Gun might finally be complete.

Have a heavy hammer, various hammer springs and poppet springs. See what kind of tune I can get once it out of leak test.

 

[SILENT SQUIRREL]

Well, this has been an adventure.
Ordered new poppet and valve seat(s) and various small parts I will drop and lose.
Turns out the valve seat can be installed backwards. Helps to look at the drawings.
That took a while to get all sealed up.

Reassembled everything but then it wouldn't cock. Spent a week off and on trying to get the whole trigger assembly figured out. Turns out the previous owner had installed 3x3mm screws and they should be 3x4mn. Finally got it all working.

Then it starts leaking around the screw that holds the poppet valve in place. Of course it is the oring. Of course it is an oddball FX size 9.3x2.4mm 90 duro. So wait for more parts, again. Got the parts, sitting in the corner in leak test.

The FX Boss Slug Gun might finally be complete.

Have a heavy hammer, various hammer springs and poppet springs. See what kind of tune I can get once it out of leak test.

You may this already, but in a pinch, you could try a #110 standard o ring (90 duro)
The dimensions are very close
9.19 x 2.62 mm

Take a look at the attached screenshot

Hope this helps

Ed

 

[SpindleB]

In a pinch you could try a # 110 standard o ring (90 duro)
The dimensions are very close
9.19 x 2.62 mm

Take a look at the attached screenshot

Hope this helps

Ed

3/8 x 3/32 worked until the 90 duro arrived.
Little larger but no issues.

But I have 24 more of the 9.3x2.4.
Minimum order was 25.

 

[SILENT SQUIRREL]

3/8 x 3/32 worked until the 90 duro arrived.
Little larger but no issues.

But I have 24 more of the 9.3x2.4.
Minimum order was 25.

From where did you source them?

 

[SpindleB]

From where did you source them?

Buna 90 O-rings 9.3 x 2.4mm Minimum 25 pcs

3mm ID x 5mm OD x 1mm CS-Price for 50 pcs

oringsandmore.com

 

[SILENT SQUIRREL]

Thank you
I'll give them a try the next time I need to buy O rings

 

[SpindleB]

850fps, 70fpe, 1800psi, 43gr slugs.
May crank the regulator up to 2200psi.

Boss slug gun works

 

[SILENT SQUIRREL]

That's only 125 bar (+/-) (doing arithmetic in my head)
Phenomenal!

 

[SpindleB]

That's only 125 bar (+/-) (doing arithmetic in my head)
Phenomenal!

That may be a bad manometer. The one on the regulator was at 2500psi