Bottled Discovery?

[aPpYe]

Hi all, my mind is somewhat boggled here.    I was originally looking at the idea of a reverse bottled qb78.  I am still considering the idea.  Then I discovered the crosman custom shop.  I really like the skeleton stocks.

However, I have never done any machining before, and I only own a bench mounted drill press, a dremel with assorted attachments, and various hand tools.  I have a bench grinder and a vise.  I am considering a cross-slide vise for the press.  I think I can manage some drilling, and maybe some basic imprecise milling with that.  I don't want to start this hobby by by spending more money on tools than I do on the gun I build.  What can I expect to be able do without a machine shop?  I am highly mechanically inclined, and not afraid take a tool to something ...

Anyway, I am seeing that there is a whole lot of skill (not to mention access to lathes, etc) that goes into building these CO2 conversions, ie, the qb/ar builds or the crosman 2xxx guns.

For now, I am thinking I might just want to get a Disco.  I want the higher shot counts I see all of you getting with your regulated guns though.  Is it feasible to build a Disco with a reverse mounted, regulated bottle?  I see reports that the gun is still shooting upwards of 850fps with 14-15 grain .22 pellets, even when the pressure gets down to 1200psi.  Many reports indicate that they refill the gun when it gets down to 1000psi.  I was thinking that since the Disco is already pretty well tuned for those pressures (and air, not co2), it might be easier to just slap a 1200psi regulated bottle on the end and call it a day!  The tube would act as a huge plenum, keeping air pressure up while the pellet travels down the barrel.  Since the tube is already closed with a nipple on the end,  I am thinking I might just need to run an adapter to that off of the bottle.  I don't know.  Like I said, my mind is sort of boggled with all the airgun information I have been absorbing for these last few weeks.   Also, since the tube is as long as the barrel, I would need something to transfer the air from the bottle (mounted more rearward, perhaps acting as the forestock) to the fill nipple/adapter/thing.

I was also thinking of one of those longer 22ci bottles with the ninja regulator and 1800psi burst disk that I see on the mac1 site.

The other thing I would want to do to it would be to mount something like the synthetic crosman skeleton stock that I see on a lot of the 2xxx guns.  This would go a ways toward bringing the weight down toward stock weight.

I wouldn't say money is no object, but I would want all this done with pressure rated, proven durable parts.

I also don't plan on using a scope, as I would rather go with aperture sights of some kind.  I also want to have a velocity adjuster, so I can adjust POI like I do with my pump guns, also increasing the shot count.  Will a Disco still shoot consistently (small extreme spread fps-wise) with the velocity adjuster, along with the spring to go with it, especially when I try to adjust down to a lower power, say in the 7-10 fpe range? 

I dunno ... I might just throw this whole idea out the window in another day or two...

To think this all started two months ago when I was considering a Umarex EBOS.  When an old Silver Streak showed up at my in-laws place, I snapped that up, discovered the steroid tune and sent it off for a workover.  I am still waiting on that one too!  For now, at least I have a p1377 to curbe my .22lr appetites.  Pellets are so much cheaper!

[zandrew]

The machining depends on the quality of tools. You can buy a cheap drill press vise or a better one. You also a need a lathe. I am not saying it can not be done. But your end results can show the quality of the tools and level of experience. Best option is to find a young but capable machinist that is affordable.

[Gertrude]

You might be over thinking the options.
You've said you are looking for a light weight, balanced, HPA gun with high shot count, and medium power.

You are looking at a significant amount of work when trying to "reverse bottle" most any gun.

Going by what you have said in a few different thread's, I think you might want to take a look at a QB79,  and then mounting a Ninja bottle and reg set at about 1400 psi.
This should accomplish what you are wanting to achieve, with far less effort or expense, than it will take to reverse bottle a Disco or QB78.
No fancy machining or plumbing required to put a regged Ninja on a QB79, and you would have a LOT of shots when regged at 1400 psi.

Hope this helps rather than hinders.

[rsterne]

Norm at Discos R Us sells a bottled Disco....

Bob

[aPpYe]

Hi Guys,

The QB79 is high on my list of considerations just for these reasons.  I may just go for that just to get my foot into the PCP/HPA door, and start tinkering from there...

However, on my disco idea, I see a lot of people using CO2 guns with a remote tank attached to a hose.  Is the same thing not possible in this instance?  Too dangerous?  What factors am I not considering, say if I want to cut away a section of forestock, strap a ninja regulated bottle to the tube its place, and run a durable, pressure rated connection to the fill nipple, or some other connector I put in its place?  Is that not going to get me a regulated disco in theory?

I saw the discosrus bottled discoveries, but I don't like that they are not regulated, and the bottle is waaay out front, it seems unruly.

Obviously I am new to this!  I like the idea of having the power of a Discovery, which is already tuned pretty well for 1200 psi as far as the shot strings I am seeing seem show.  I don't mind uglifying a gun.  I kind of like the idea of making it look banged up, worn out and freakish honestly.  I would keep all the internals in pristine working order...

If these newbie ideas are making you roll your eyes, feel free to set me straight!  I definitely don't want a bomb going off because I did something wrong.