PP700 adventure started(Artemis PP700s-a)

[BSJ]

Is anyone making extra long barrels for the PP700?

And, does anyone know the thread size of the factory regulator?

[MonsterMaxx]

Does anyone know what this extra set screw if for in the breech block?  My Artimus doesn't have it and the mrodair does.  Doesn't seem to serve any purpose unless it's a stop to align the block.  I can't think of anything else it would do.

It would add an extra operation to the guided breech block and I'm about to cut final prints for prototypes.  Don't want to add any cost I don't have to.

While I'm on the subject of this little pistol, mine leaks like a sieve.  Like down to zero in under an hour.  So I took it all apart and now when I reassemble I need to set the depth of the valve spring retainer.  Anyone know what it should be for a .22?

[BSJ]

Does anyone know what this extra set screw if for in the breech block?  My Artimus doesn't have it and the mrodair does.  Doesn't seem to serve any purpose unless it's a stop to align the block.  I can't think of anything else it would do.

It would add an extra operation to the guided breech block and I'm about to cut final prints for prototypes.  Don't want to add any cost I don't have to.

While I'm on the subject of this little pistol, mine leaks like a sieve.  Like down to zero in under an hour.  So I took it all apart and now when I reassemble I need to set the depth of the valve spring retainer.  Anyone know what it should be for a .22?

It's a retaining screw. Should keep the block from sliding off the valve.

[MonsterMaxx]

Nope, no interface with the valve at all.  The valve has a shoulder which keeps the block from coming off.

I think it's a stop to adjust where the block stops - think flush with the breech aligning the air hole with the pellet.  It's the only thing that makes sense.  The set screw doesn't go thru the block, so there's nothing to engage it other than as a stop.

[BSJ]

That's what I get for going by remembery...

[LeE]

Lee

"With the adapter and stock mounted, you can set the sight alignment by loosening the outside screw and move the stock up or down until you find the position that suites you and then by tightening the screw again to hold it in place"

Do you mean the stock pivots on this screw to adjust for sight alignment?

Correct, that is how it works. When the screw is tightened down, the stock will not move under normal use. During testing, I could only get it to move when I purposely tried excreting a lot force on the fulcrum.

[dang3r]

Nope, no interface with the valve at all.  The valve has a shoulder which keeps the block from coming off.

I think it's a stop to adjust where the block stops - think flush with the breech aligning the air hole with the pellet.  It's the only thing that makes sense.  The set screw doesn't go thru the block, so there's nothing to engage it other than as a stop.

  Yep this is door stop so you can align it as you wish. Newer models have this extra hole on breech doors and it is already threaded for 2mm screw.

[MonsterMaxx]

I found my leak.  Between the regulator and the breech.  Careful inspection shows that someone got a little rough deburring the hole and the o-ring won't seal now.  It was NOT me, it looked like this when I opened it.

I tried all my hones - too big.  Even tried mcmaster and grainger, but nothing small enough to do the Ø.615 hole.

I've reached out to Mike via phone (VM) and email - zero response.

Any bright ideas?  I'd hate to go at it with a dowel and emery cloth and make it worse and have Mike say I messed it up and end up with a gun that just won't seal.

[nervoustrigger]

Apply a bit of lacquer to the rough surface.  It will self level and provide a smooth surface for the O-ring to seal against.  Fingernail polish is a suitable lacquer but it's rather thick so I recommend thinning it a little.

[Rallyshark]

I found my leak.  Between the regulator and the breech.  Careful inspection shows that someone got a little rough deburring the hole and the o-ring won't seal now.  It was NOT me, it looked like this when I opened it.

I tried all my hones - too big.  Even tried mcmaster and grainger, but nothing small enough to do the Ø.615 hole.

I've reached out to Mike via phone (VM) and email - zero response.

Any bright ideas?  I'd hate to go at it with a dowel and emery cloth and make it worse and have Mike say I messed it up and end up with a gun that just won't seal.

Maybe, try a barrel mop chucked in a dremel(or drill) coated with some rubbing compound.  Otherwise, roll up a some fine sand paper and get at it like that.  Carefully, of course

[MonsterMaxx]

Well, not only did I find my leak in the .22, but I found a hone small enough to fit...in my toolbox of all places.  It took a little jury rigging to make it work (a twist tie to hold one end and a little rubber cap to push the other apart), but work it did.  Honed the breech and retested.  No bubbling leaks found.  I'll let it sit overnight and see how it does.

Craziest thing, the .177 is now holding air.  Baffling.

Now on to tuning.  When I took the .22 apart I unscrewed the valve poppet to look in there for damage.  Sadly I didn't record how much it was screwed in.  From fully in to the valve fully open I have to unscrew it 3.5 turns. David said something about 2 turns, but then the valve won't open all the way.  Since I have no clue what the cause and effect is of this I'm not even sure what I'm doing, much less what to do. Hammer spring, regulator, valve spring...  probably discussed in this thread, but at 57 pages, perhaps it's worth restating, if someone wouldn't mind.

[BSJ]

Does anyone know where to get a fitting like this https://uk.rs-online.com/web/p/hydraulic-straight-threaded-adaptors-unions-reducers/8712240/ in the US?

With one of these fittings and two p/n 41 end plugs you can join two reservoirs together and double the air capacity.

With a double length barrel I'd have the makings for a nifty 2xPP700 carbine/rifle...

[BSJ]

Does anyone know the thread size of the factory regulator?

M10x1 is the thread size.

[dang3r]

or you can do this

[Wayne52]

That's a very cool rig you've got there Andreas!!!  The thing that was really alluring to me about the PP700SA was the fact it could be used as a pistol very comfortably with enough power for hunting.  I chose just to do a little tweeking of the regulator and add an LDC.  I have always been a pistol enthusiast.

[dang3r]

It is indeed amazing pistol but I just can't stop tweaking, tuning  and fixing (or breaking) stuff, it's in my blood I suppose lol

[Sfttailrdr46]

Wayne I have a stock adapter coming from Vash545 aka Lee. It mounts into the base of th pistol grip and accepts an AR butt stock so easily installed and removed so I will have a convenient .22 pistol for quick close in pest removal or a light weight carbile for improved accuracy when wanted and lightweight in either configuration

[Wayne52]

Those are very cool adaptors Don!  I've got the SS valve coming for my Prod (it's in the mail right now) and that will definitely fit the bill for my ultimate carbine hopefully.

[Sfttailrdr46]

Wayne I keep finding creative ways to spend my discretionary budget on AG related stuff. Eventually I will spring for a Woods Walker P-Rod. 

[Techie]

Don, please let us know what you think of that stock adapter when you get it and how it all works together.  He mentioned you can get an AR stock and tube for under 30 bucks on eBay or Amazon, but I searched and can not find anything near that cheap.  Plus, I'm not sure what size tube I'd end up with, as apparently there are two different size tubes.  I know nothing about AR stocks and tubes.  A turnkey solution with stock would probably generate more sales for that adapter rather than trying to figure it all out ourselves, especially if it only added $30 to the cost.