Indy clone update; pics

Indy clone update; pics

Joined: April 1st, 2009, 3:18 am

November 19th, 2011, 3:14 am #1

Alright. Finally at a point in the build that I feel comfy sharing some pics of the progress. The pump tube is off being slotted and drilled, and the two stage piston is off getting some work done to it...

The gun will function as a two-in-one modular unit. It can use a bottle, or it can use the pump tube. Of course, the bottle configuration will produce the highest shot count, around 150 full power shots for a 13cu.in, 3000psi reg to 1200psi bottle.

To give an idea of what is going on here: HPA tanks/bottles etc use a thread of .812 (or so) by 14 thread. The valve face is threaded to that and an ASA enxtension is used to connect to bottle (for clearance reasons). When switching to pump tube, the bottle is removed first (for bleed of), then the ASA extension is removed. The pump tube has an extension/male portion that protrudes from the base to thread in to the valve body. The 'extension', which has the threads cut in to it (.812x14 NGO thread) is also the second stage compression chamber AND vlave check seal. Get it?

After some number crunching, math help/direction from SteveNC, it was decided to ditch using the tube itself as any form of pressure retaining element, either psi load on axial stress of fasteners placed radially, or pressure vessel. Not that it wouldn't work, mainly because something better naturally came along in the design elements alone.

There will be four 6-32 screws securing the valve and rear end plug (stock attachment), eight total, and four holding the front plug where the bottle is/pump tube. Said screws DO NOT hold any load at all; only prevent twisting motion of parts.

This gun has been designed to use either the Crosman designed breeches OR the Chinese QB series of breeches. TA-DA folks!! Being that the breech is not used to cock the gun, only as pellet loading device, many breeches in theory will work.

Still a bit needs to be done, i.e. anodize the parts, get other parts back from the shop, get the breech I TRULY want (the Discovery rotary breech).

You can see the lever in the pics too.

Items look much better in person - not a photo specialist at all. All parts are machined to perfect tolerances and have allowed for the hard coating anodizing.

Enough speak, here is some eye candy.

The completed "lower action", lever up top. The drill bit sticking out is the transfer hole area. The bit is keeping the valve aligned while work is being done. Also note the black line on the tube - it needs to be cut off there - way too long as it is in the photo:


rear plug that attaches M4 buddy stock:


Valve with ASA entension, assembled:


Valve face, threads:


Valve with stem seal, spring, ASA extension:


Striker/hammer, spring guide and spring:


Bottom view of gun (foregrip will attach via threaded hole):


Lower action assembled, minus the tube (for reference of the internal assembly):


Pistol frame and hammer/striker tube:




"The majority of things in our lives are created by folks no smarter than the rest. Afterall, the world is comprised, and operated by C average people intellctually, academically, and morally. These people are often the great pioneers that set the precedent for what excellence should be."
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Joined: April 28th, 2010, 12:23 am

November 19th, 2011, 3:30 am #2

no need to anodize , it looks badass!!!!!Hows the barrrel doin during testing on other guns , is it broken in now??I actually cracked a beer to start reading this so im not sure how your spring guide runs the full length of the spring, but i assume 2 different i.d's allow the spring to move with no restriction.
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Joined: November 5th, 2008, 8:23 pm

November 19th, 2011, 3:31 am #3

Alright. Finally at a point in the build that I feel comfy sharing some pics of the progress. The pump tube is off being slotted and drilled, and the two stage piston is off getting some work done to it...

The gun will function as a two-in-one modular unit. It can use a bottle, or it can use the pump tube. Of course, the bottle configuration will produce the highest shot count, around 150 full power shots for a 13cu.in, 3000psi reg to 1200psi bottle.

To give an idea of what is going on here: HPA tanks/bottles etc use a thread of .812 (or so) by 14 thread. The valve face is threaded to that and an ASA enxtension is used to connect to bottle (for clearance reasons). When switching to pump tube, the bottle is removed first (for bleed of), then the ASA extension is removed. The pump tube has an extension/male portion that protrudes from the base to thread in to the valve body. The 'extension', which has the threads cut in to it (.812x14 NGO thread) is also the second stage compression chamber AND vlave check seal. Get it?

After some number crunching, math help/direction from SteveNC, it was decided to ditch using the tube itself as any form of pressure retaining element, either psi load on axial stress of fasteners placed radially, or pressure vessel. Not that it wouldn't work, mainly because something better naturally came along in the design elements alone.

There will be four 6-32 screws securing the valve and rear end plug (stock attachment), eight total, and four holding the front plug where the bottle is/pump tube. Said screws DO NOT hold any load at all; only prevent twisting motion of parts.

This gun has been designed to use either the Crosman designed breeches OR the Chinese QB series of breeches. TA-DA folks!! Being that the breech is not used to cock the gun, only as pellet loading device, many breeches in theory will work.

Still a bit needs to be done, i.e. anodize the parts, get other parts back from the shop, get the breech I TRULY want (the Discovery rotary breech).

You can see the lever in the pics too.

Items look much better in person - not a photo specialist at all. All parts are machined to perfect tolerances and have allowed for the hard coating anodizing.

Enough speak, here is some eye candy.

The completed "lower action", lever up top. The drill bit sticking out is the transfer hole area. The bit is keeping the valve aligned while work is being done. Also note the black line on the tube - it needs to be cut off there - way too long as it is in the photo:


rear plug that attaches M4 buddy stock:


Valve with ASA entension, assembled:


Valve face, threads:


Valve with stem seal, spring, ASA extension:


Striker/hammer, spring guide and spring:


Bottom view of gun (foregrip will attach via threaded hole):


Lower action assembled, minus the tube (for reference of the internal assembly):


Pistol frame and hammer/striker tube:




"The majority of things in our lives are created by folks no smarter than the rest. Afterall, the world is comprised, and operated by C average people intellctually, academically, and morally. These people are often the great pioneers that set the precedent for what excellence should be."
Phil---You Da Man !!!!!!!!----nt cause I'm speechless!
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Joined: April 1st, 2009, 3:18 am

November 19th, 2011, 3:45 am #4

no need to anodize , it looks badass!!!!!Hows the barrrel doin during testing on other guns , is it broken in now??I actually cracked a beer to start reading this so im not sure how your spring guide runs the full length of the spring, but i assume 2 different i.d's allow the spring to move with no restriction.
...the way down to 1/4" away from the face. There is a shelf built in the hammer where the spring rests by using an aluminum tube, then the deeper hole is slightly bigger than the guide rod. Nice, super smooth action/motion. Hammer is bigger in apperance than a Benji hammer, but weighs nearly half! Not much spring is needed to send it zipping forward. Also, there is no preload on the hammer spring acting against the valve stem.

The o-ring gland is actually for the HDD. Not an o-ring material HDD, but a composite material that has a groove.

"The majority of things in our lives are created by folks no smarter than the rest. Afterall, the world is comprised, and operated by C average people intellctually, academically, and morally. These people are often the great pioneers that set the precedent for what excellence should be."
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Joined: April 1st, 2009, 3:18 am

November 19th, 2011, 3:45 am #5

Phil---You Da Man !!!!!!!!----nt cause I'm speechless!
"The majority of things in our lives are created by folks no smarter than the rest. Afterall, the world is comprised, and operated by C average people intellctually, academically, and morally. These people are often the great pioneers that set the precedent for what excellence should be."
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Joined: April 28th, 2010, 12:23 am

November 19th, 2011, 3:52 am #6

...the way down to 1/4" away from the face. There is a shelf built in the hammer where the spring rests by using an aluminum tube, then the deeper hole is slightly bigger than the guide rod. Nice, super smooth action/motion. Hammer is bigger in apperance than a Benji hammer, but weighs nearly half! Not much spring is needed to send it zipping forward. Also, there is no preload on the hammer spring acting against the valve stem.

The o-ring gland is actually for the HDD. Not an o-ring material HDD, but a composite material that has a groove.

"The majority of things in our lives are created by folks no smarter than the rest. Afterall, the world is comprised, and operated by C average people intellctually, academically, and morally. These people are often the great pioneers that set the precedent for what excellence should be."
cant wait to see how the barrel and action mate up for a complete gun, too cool.
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Joined: April 1st, 2009, 3:18 am

November 19th, 2011, 4:18 am #7

...works better than I can shoot, which helps me out in the end. Put it on several different platforms. A Disco, two different pumpers, and friends 2240.

Carefully inspected endless brands of pellets to see if there is equal pressure form all the 'lands'... Systems are a go with it!!

"The majority of things in our lives are created by folks no smarter than the rest. Afterall, the world is comprised, and operated by C average people intellctually, academically, and morally. These people are often the great pioneers that set the precedent for what excellence should be."
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Joined: April 28th, 2010, 12:23 am

November 19th, 2011, 4:33 am #8

lol, kids will have 760 smooth twist barrels , laser accurate!!!!!!!
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Joined: September 23rd, 2002, 6:16 pm

November 19th, 2011, 5:13 am #9

no need to anodize , it looks badass!!!!!Hows the barrrel doin during testing on other guns , is it broken in now??I actually cracked a beer to start reading this so im not sure how your spring guide runs the full length of the spring, but i assume 2 different i.d's allow the spring to move with no restriction.
I missed seeing any receiver in those pics??????
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Joined: April 28th, 2010, 12:23 am

November 19th, 2011, 5:36 am #10

i think the term is flexible enough
Last edited by robnewyork on November 19th, 2011, 5:43 am, edited 1 time in total.
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