Are you gonna do it yourself?
I have JM GRT kit in my 34 and I would and will buy another. Super smooth and no twang at all. 730 FPS with 14.6 FTT .22. About $69 bucks and worth every penny. Dustin http://www.airrifleheadquarters.com/catalog/item/251488/2514146.htmAnd the sealhttp://www.airrifleheadquarters.com/catalog/item/251485/43075.htmAnd of course the lubehttp://www.airrifleheadquarters.com/catalog/item/251484/4169286.htm