The TbT Maxi PRO Kit for the 26mm piston HW97/77 gives you everything you need to transform your rifle’s performance in one, cost effective package!
Genuine HW export power spring with fitted guides, short stroke extension, pot of Bum-Slide high moly paste, instructions and sticker all included.
This kit is for the 26mm piston version only and may increase power, chrono required! Full instructions on spring shortening available in “Instructions”
Available from stock