In this video I will discuss and install Duy's replacement parts for the ATI Nova Liberty. Duy has created a steel transfer port, brass and stainless steel valves with more power, Externally adjustable hammer spring tension-er and a power plenum which can produce well aboue 70 FPE in .22 caliber. You can contact Duy directly at (254) 415-1187 via Text or Call and via email @ Dinhkhacduy@msn.com