Modified Rapid

[Dijon]

Let's start up front, I know between nothing and very little about the technicalities of Rapids, so please go easy on what is probably a simplistic question.
I've owned this modified Rapid for a number of years, but I do not know why this hole was machined into the underside of the stock, so can you guys please enlighten me?

[DAVYW1]

Hi Dijon,
The screw you see through the hole is the block blanking plug in the bottom of the Rapid block. This can be removed and a quick fill fitting put in its place so the rifle can be filled with air without having to remove the bottle every time. This setup only works with a fast flow adapter fitted. Obviously the stock has to be drilled so you can access this quick fill fitting. Hooe this helps.

[Ca_Varminter]

There are 2 obvious reasons for this hole....
!. Possibly the previous owner tried to install a QuickFill port.
  It wouldn't have gone well since it probably regulated....
2. To install gauge to check on the Regulator Cutoff pressure..

Hth, Stuart

[Dijon]

Thanks guys - those answers pretty much tie in with what I've been told in the past, but there were always caveats re why it wouldn't work! I guess I'll have to delve deeper.

[Ca_Varminter]

Just for point of reference....
Here is a proper install of a QF on a FastFlow Rapid done by myself.....



Slightly different setup using the RAW Backfillable QF.
It can bet setup to use with with or without a Reg....



To read more about my Installs and setup:
https://rapidforum.co.uk/forum/index.php?topic=185.0

Stuart

[Dijon]

Thanks Stuart, that's really useful info, and the quality of those installs is outstanding

[Brooksy]

Thanks Stuart, that's really useful info, and the quality of those installs is outstanding

His work is mustard isn't it, Dijon?
See what I did there? 

[Dijon]

His work is mustard isn't it, Dijon?
See what I did there? 
[/quote]

Even better than the dog's danglies! 👌

[Ca_Varminter]

His work is mustard isn't it, Dijon?
See what I did there? 

Even better than the dog's danglies! 👌

I will Accept any compliment I can GET!
          
Stuart

[angrybear]

Thanks guys - those answers pretty much tie in with what I've been told in the past, but there were always caveats re why it wouldn't work! I guess I'll have to delve deeper.

It won't work if the rifle is regulated because a regulator is a valve that shuts off as soon as it has the pre-set pressure behind it,
so it's no use as a quick fill because you can't back fill the bottle through the reg above the firing pressure,
Nor is it much use as a pressure gauge, because it can't read the bottle contents, only the pressure the reg is set to shoot at.
So if reg'd the only practical option is a combined gauge/QF between bottle & reg as photo.

OTOH if the rifle is NOT reg'd the bottle & firing chamber have an open passage between them, so either QF or gauge would work,
but the combined unit is still better.

[alan1]

Hi I've a gage in mine it tells the reg pressure