Crosman Nitro Piston Conversion, Fits Many Older Gamo Rifles

Much more consistent shooting. Gives a solid TWAP ! instead of the TWANGG! i am used to in my Gamo Whisper. I feel like the torque/twisting/vibration of the springer is gone completely and my accuracy and confidence of hitting small targets has gone up considerably.

Include basic instructions for those not choosing to have this installed by Pyramyd - Possibly a centering socket/bushing to contain the ram ?

I did not find a LOT of information online about how to install the ram - but there is enough out there if you have any experience disassembling your airgun. Use a large clamp or spring compressor for sure. I am a do-it-yourselfer and the cost of shipping/being away from my baby for a week was not worth having Pyramyd do the work.
I did not like the fact the smaller 1/4"rod end of the ram directly impinges on the gun piston with no centering washer/bushing or anything between the rod and piston like the old spring had. I suppose it is fairly stable because the gas ram body is centered in the spring tube, but it felt like there was room for improvement in the overall design of this retrofit. I will disassemble at a later date to inspect the gun piston for any damage, so far there is no indication anything is wrong.
Overall - I'm extremely happy with the results of the conversion and wish i had done it long ago. As a bonus I still have the old spring if/when the gas ram ever fails !

I had this installed into my older Gamo Viper. This piston exceeded my expectations. I have another Gamo with their IGT system and the Crossman Nitro blows it away. My rifle sounds like a .22 and has awesome power. I may send my other rifle in and have it changed to the Nitro piston.

Nothing

No spring rattle when fired, but seemingly sharper report. Maybe because of no rattle.

I'm happy

I'm happy

I had the spring in my 2008 Gamo Varmit Hunter 177 cal replaced with the Crosman Nitro Piston. The Varmit Hunter 177 is advertised to shoot 1000 FPS with lead and 1200 FPS with PBA. The test firing report after the conversion showed 925 FPS with lead ammo. This is a insignificant difference considering you are basically getting a new gun for half the cost of a new one. This is about what I get from my various my 22 cals with PBA. Overall I am very pleased with the results on the my Varmit Hunter. Although the nitro piston costs more than a new spring it is less half the cost of a new gun at$210.. Service and turn round time was excellent. One week. Technical report with gun.

Try to reduce V losses.

You get your old gun fixed at a fair price plus all the benefits of the Nitro Piston some of which are:

There is some noise reduction over the spring version
You can leave the gun cocked longer without damage
Loss of power was not significant considering benefits

I had the spring in my 2008 Gamo Varmit Hunter 177 cal replaced with the Crosman Nitro Piston. The Varmit Hunter 177 is advertised to shoot 1000 FPS with lead and 1200 FPS with PBA. The test firing report after the conversion showed 925 FPS with lead ammo. This is a insignificant difference considering you are basically getting a new gun, for half the cost of a new one. This is about what I get from my various my 22 cals with PBA. Overall I am very pleased with the results on the my Varmit Hunter. Although the nitro piston costs more than a new spring it is less half the cost of a new gun at$210.. Service and turn round time was excellent. One week. Technical report with gun.

Try to reduce V losses. Try to reduce cost to be more in line with spring replacement

You get your old gun fixed at a fair price plus all the benefits of the Nitro Piston some of which are:

There is some noise reduction over the spring version
You can leave the gun cocked longer without damage
Loss of power was not significant considering benefits

The price is good but you only get what you pay for! So read on..

My TechForce 99 premier .22 shot at 670 ft/ps with a Damaged spring in it. Because the pyramid Air advertisement says the gun will maintain its original velocity I went with the Nitro Piston replacment. When I got the gun back I shot it and recorded 650 ft/ps 20 ft/ps less than the bad spring would produce.

Robert who did my gun at Air Ventures said all guns loose performace after the Nitro Piston is replaced but only about 20-30 ft/ps. That would fine but I lost that much performance off the damaged spring. This gun with a good spring shot 850-875 with stock TechForce .22 lead pellets. Now I'm at 650 and thats not acceptable.

It is still about the same loudness on my Gamo Bone Collector 22. I also had my Gamo Hunter Pro .177 done and is a little bit quieter. Now both guns shoot "VERY-WELL" with the additions of the Nitro-Pistons!!! I am overall very pleased with the outcome on both guns.

If it is like a mini Bilstein Gas shock it will last forever. Just good old compressed nitrogen. Only thing that can really go out is them shaft seal. I really don't know what else to change but maybe the trigger???

I had very good service and turn around time and i live on the west coast. I also am happy that Pyramid Air did the conversion. They have the proper tools and know how after doing so many. It can sometimes turn out to be one of those half hour jobs that can somehow take the average Joe 3 hours!!!

I should have bought this product years ago. The piston delivers better shot to shot cosistency over the spring system. I cant say enough about Pyramid Air, this purchase was the fastest turn around ever. Im very satisfied with Pyramid Air and my newly installed Nitro Piston.

Cant come up with anything

This product is worth every penny, a Nitro Piston should be your first upgrade.

Not much. It was good while it lasted. But louder than advertised.

Make it not die after 200 rounds of 9gr. pellets. After 200 rounds of .177 polymags in my Whisper, it lost half it's power. Normally, says the repair dept who received my Whisper for repair, they die outright, mine did not. It lost half it's cocking force and pellets just rolled slowly down range. It did so AFTER the 1-year warranty. So I am out of luck and going back to spring, and paying for all the work to be done. My Whisper now cost me almost twice it's original price, and for what?

I think the failure rate on these devices should be published on Pyramid's website. It might be higher than you think.

A great fix for a broken springer.

I think turn around time was too long....that's a joke, these guys were fantastic? 8 days from door to door.

when the conversion is done in a older Gamo whisper, the sound level is higher. The Whisper which was pretty quiet and the conversion which is suppose to be quiet, when added together you give up ones quiet. Still enjoyable to shoot