Lower power gas rams?

[Marc]

So there are reduced power springs for springers, but are there lower power gas rams available for gas ram guns?  Say if you wanted to get a 15 FPE gun down to 10-12 FPE? 

[JimL911]

HW 90 is adjustable. Canadian level http://www.dlairgun.com/Air-Rifles/Crosman/052_MTR77NPC.html
British 12 fpe version http://airgunbuyer.com/Showproducts.asp?cat=Air Rifles&SubCat=Crosman Air Rifles

[Motorhead]

Crosman has 2 differing pressure rams.  Sadly with Theoben no longer making them the field of choices are pretty thin 

[Scotchmo]

So there are reduced power springs for springers, but are there lower power gas rams available for gas ram guns?  Say if you wanted to get a 15 FPE gun down to 10-12 FPE? 

If you fit one of the industry standard size gas springs to your your rifle, you can order a gas spring of any pressure rating.

http://www.n-forcer.com/content/pdf/Mini.pdf

Many of the higher quality gas springs such as those can be further reduced by bumping the valve to bleed a little air. Or you can get a nitrogen tank (air might work too) and adapter to fill them higher.

[Dick Tracey]

I thought I read that the Vortex gas spring offered in Hatsan's was capable of changing the pressure.  Just have to find a source for them.

DT

[mpbby]

In Brazil people are getting used to replace steel springs for gas ram. So, there are several gas ram springs available, for different brands/models.  As to the power, they come from 40 kg to 75 kg; as far as I know, they are not adjustable.
It depends on what gas ram(s), out of the box, fits to your rifle.
For example, see below, I have 2 Gamo/Whisper X, each one with a different power gas ram.
 

[dw]

I thought I read that the Vortex gas spring offered in Hatsan's was capable of changing the pressure.  Just have to find a source for them.

DT

That's a problem, so far as I can tell.  Anyone living in the US yet been able to find a source for the Hatsan Vortex gas pistons online, so one doesn't have to send the gun in to Hatsan to get it replaced, once out of warranty?  I'm thinking of getting one of the n-forcer nitro pistons when mine fail (Strider, 95, 135, all Vortex).  Anyone have any recent updates on the best options for these models?

Thanks.

Dennis

[JR]

I know all Crosman does to lower the speed for the regulated places is drill a small hole in the end of the piston head to let some pressure escape on most models. Plug the hole back up and it's back to where it should be.

[Privateer]

Looking at two brand new Crosman Nitro Pistons here.
The Piston for the Trail XL is a sealed piston that shows no way to bleed or add gas.
The new Nitro Venom Dusk piston has a threaded hole in the back of it.
I'm thinking that's to add/remove gas?

[JR]

I should have said the spring guns have a hole in the center of the piston, I have heard of a few ram guns with a off center hole in the piston. NP models have the shaft in the center of the back of the piston

I have  2 Trail and 1 XL NP's right here I'm looking at, all these are sealed, but they are a year or more old, new rams might be different.

[Privateer]

When I pull the old NVD Ram I'll check it for that drill hole.

[56S]

Crosman does offer a C8 and a C7 Titan model.  The C7 uses a detuned gas ram. All other parts including the piston remain the same.  The newer Crosman gas struts for the non XL trails, Titans, NVD etc all have a 4mm threaded hole on the cartridge end. This is for mounting.  It comes in handy when reversing your ram as I have done with my NVD.
http://www.gatewaytoairguns.org/GTA/index.php?action=dlattach;topic=4852.0;attach=22929;image