hw99s piston.

[bighit]

Is this in all hw99s pistons? http://abload.de/img/46ejn0.jpg

I gave my piston a good tap on the vice but nothing came out of mine.

I have put a new spring in that is supposedly a genuine hw one but its an inch longer than my old bent one.

Paul.

[rabbitwrecker]

Not in mine either...

[tinbum]

Yes, very common! The new spring should mean you don't need them to make power.

[Half MOA]

Not in mine.

[bighit]

Cheers guys. If I look into the cocking slot on the piston, the bit the spring sits on is level with the slots end. Does that mean there is a weight in there?

Paul

[tinbum]

If there is one its held in with a small o ring. Try and wiggle it with a pick through the slot, if it wont move its not a weight.

[bighit]

If there is one its held in with a small o ring. Try and wiggle it with a pick through the slot, if it wont move its not a weight.

Its back together lol. I meant to look in with a torch.

Thanks nick. I will strip tomorrow and look.

[bighit]

https://www.dropbox.com/sc/6lqx6ajzy...ZMCb0mOL3udgVa
https://www.dropbox.com/sc/10a5ve33b...N5i70uCnq5xSTa


That's the inside of my piston. Banged it on a vice and it never had any fall out. Tried levering it out but nothing moved.

Has it got the weight or is that the way the piston should be ?

Paul

[tinbum]

Looks good to go! I wouldn't bother taking that gun apart!

[bighit]

Looks good to go! I wouldn't bother taking that gun apart!

I did lol. That's how I got the pics lol. Back together now. I got a kit of a friend. Konceptus I think he said. He got it for a Hw99s he was buying but never got the rifle. I have fitted it with out any preloaded washers as the spring was at least an inch longer that the one that came out of the rifle.

https://www.dropbox.com/s/dob0ivntyu...0004.jpeg?dl=0

[Mark A]

I did lol. That's how I got the pics lol. Back together now. I got a kit of a friend. Konceptus I think he said. He got it for a Hw99s he was buying but never got the rifle. I have fitted it with out any preloaded washers as the spring was at least an inch longer that the one that came out of the rifle.

https://www.dropbox.com/s/dob0ivntyu...0004.jpeg?dl=0

Whats the Konceptus kit like, have you tested it yet?

[bighit]

Whats the Konceptus kit like, have you tested it yet?

Only fired a few shots. Bit of recoil but it may be dieseling. Need to shoot it more. And chronograph it.

[TonyL]

I did lol. That's how I got the pics lol. Back together now. I got a kit of a friend. Konceptus I think he said. He got it for a Hw99s he was buying but never got the rifle. I have fitted it with out any preloaded washers as the spring was at least an inch longer that the one that came out of the rifle.

https://www.dropbox.com/s/dob0ivntyu...0004.jpeg?dl=0

Was there a top hat with the kit?

[bighit]

Was there a top hat with the kit?

there was TonyL. Top hat ,guide , 3 washers of different sizes and the spring. It's only got the guide and top hat in just now.

Before I fitted the kit the back block was half way in the action. With the kit and new spring it's outside the action if you get what I mean. The original spring is way shorter than the new one.

Hopefully I will get it chronographed this weekend.


I used Ep2 moly grease on it. It's dieseling a bit and a bit of recoil. It would not do the pellet on the scope cap test lol.

As long as it's accurate for bunnies I will be happy.

[bighit]

https://www.dropbox.com/sc/mao9xvo9x...WM5pJiBlsDXACa that's the kit TonyL. The second pic shows how far the guide sticks out with the top hat in the piston also.i did cut a bit off the guide as I thought it was too long. It's the same design as the original guide. A tube with a washer . It's not one piece.