My mk1 127 had a Plastic Trigger, Plastic Piston Seal. Got a Parachute Seal and FAC Extra Spring,and a Alu. mk2 Trigger from Canada(500fps or less Land) without FAC. Great results Much more Power. Alu. Trigger is the Ball's. Spring about 5' Long. Made 127 best Springer I ever Shot bar none. Almost 20 flb w/14.75 H&N English Round Nose(the Pellet I Hunt with) in the 127. The Springer Artillery Hold dose not work. Have to hold Strong and in to Shoulder hard And Shoot's like a Dream, Squirrel Medicine Machine.....Franky