LPR integrated into forgrip

[hill160881]

Lets try thin again.
Rules: Stay on topic and no flaming

Well i have a feeling Renie and I were thinking along the same lines at the same time. lol I have been wanting to do this for almost a year now and thanks to him it may become a reality. I also have permission from him to post this.

Some have suguested this design could get pinched but seriously it is a coppy of another reg in a new housing. This reg was the template as it is simple and the parts are easy to get.




The point is to get something that will relocate the LPR from under the barrel or off the side of the asa to the forgrip and not look like an LPR.

This was my first idea




Now that looks good for what i used it for but wont work for an Ego Mag.

So I sketched this out using the internals from above.



Then the newest member to the Mag modding comunity, "Renie" privided this ruf cad to shw it is possible. He may be new here but the force is strong with this one. hehe




Any thoughts on the design or any other ideas are welcome. I considered using a Matrix LPR and designing it to just accept one of those, but think the parts I selected will be around and available longer than PPS.

[AO Moderation Team]

Next Troll gets a Ban.

[knownothingmags]

hey hill,

is there a way to make those parts in that reg, but smaller, maybe 50%?

maybe on a lathe or a mill?

for some reason i am confused on how a lpr works.
i see how i just dont understand it.

i took my tickler apart, got confused.

are you going to try and make your parts smaller?
or just take them out of regs and use them?

thanks,
KNM

when and if you make these im down for 2-5 of them.

[luke]

For the most part he is just wants to make a new housing and use parts from a proven regulator.

[knownothingmags]

For the most part he is just wants to make a new housing and use parts from a proven regulator.

gotcha.

[hill160881]

That is a possible plan but I need to find out if the diameter of the piston can be reduced without changing the shrader valve dimensions equally, I may be over thinking things. It would likely just need a stiffer spring behind the piston.

Renie may already know though.

[renie]

in theory it should be possible to get the lpr down to about 10-12mm od but trials will tell

should be able to get the piston down to 8-9mm but it would make the lpr a little longer than say a tickler, as u will still need room for the low pressure air, but only testing will tell i may just make a straight lpr for now for testing purposes, that way it will give an idea on what it would need to be in a grip, only pain in the arse is shrader valves have there own thread, so im gonna have to order a Tap and there tapered which doesnt help

[hill160881]

Here are the ruff drawings of the internals and there aproxamate sizes. This grip with LPR intagrated could be made as small as .75" thick by 1.125" deep by 2.5"tall. Thats Samall I would increase the thicknesses a bit though to be safe.
If the piston can be reduced in size it could get smaller.

[hill160881]

There is almost no volume needed due to the size of the pistons used and the fact that the recharge rate is made faster by the higher input pressure. So volume on the LP side is not important.

This design already has .60 cubic inches of volume then the lines. It shoots plenty fast enough to.

[renie]

ill try and get something done tomorrow when the boss is out

[hill160881]

How much will the tool cost to cut the shrader valve? I will cover it.

I also recommend you get in touch with y0da900 as he knows the tolerances for orings used in these types of devices, assuming you dont already do this at work all the time

[renie]

$500 bucks
only kidding im trying to source one online now

[Spider-TW]

Schrader inserts are not my friend on LPRs. Most inserts don't have much of a pin guide and the pin wobbles a lot. I came across a Next LPR for a timmy that would work for a few shots, then fail to seal. I still have an old shocktech on a gen-e matrix with an insert in it, but those regs don't have a great reputation either. Modded a bit, it seems fine though.

Just make sure your pin on the insert is straight to start with, I found a new one that was bent.

[hill160881]

So maybe lengthen the piston between the orings to keep it from wobbling as much? Also further dish out the end to cup and holt the pin more?

[renie]

the aircon ones are better made and you can get higher pressure ones too