Ramset 4160 & 4170

1 – Receiver Assembly, 2 – Barrel Assembly, 3 – Piston W/Ring, 4 – Piston Ring, 5 – Muzzle Bushing Shroud, 6 – Shroud Retaining Ring, 7 – Buffer, 8 – Muzzle Bushing Assembly, 9 – Cocking Slide Extractor, 10 – Piston Return Pawl, 11 – Piston Pawl Spring, 12 – Pawl Cap Assembly, 14 – Shroud nut & lock washer, 15 – Trigger Assembly, 16 – Trigger Pin, 17 – Trigger Return Spring, 18 – Barrel Screw & Lock Washer, 19 – Barrel Return Spring, 20 – Firing Pin Spring Button, 21 – Firing Pin Assembly, 22 – Firing Pin Pawl Spring, 23 – Firing Pawl, 24 – Firing Pin Spring, 25 – Cocking Slide Extractor Spring, 26 – Handle Screw & Lock Washer, 27 – Handle Assembly, 28 – Spall Gaurd