sorry it took so long to reply had to go out of town.last night i dissembled the trigger group,it seem that the sear was stuck,after checking out the trigger parts i reassembled and installed trigger group and it fired as it should.thanks for the response to my problem.this is my 3rd pcp,i have a airarms fac 500 an now the hatsan,just sold airforce talon.i really enjoy the pcp guns.