I'm upgrading to a SHS 15ST/7ST with POM piston head, sorbo, corrected AoE, radiused cylinders, lonex a2, hamsterfet, replaced trigger wiring, 16awg silver plated custom wiring, shs cylinder head and shs air nozzle m4.
This is to b e put in my KA Reinforced gearbox and upped with an M140...