Ramset SA-270 (Generation 1)

1 – Front Barrel, 2 – Barrel Retaining Assembly, 3 – Muzzle Bushing, 4 – Piston W/Ring, 4A – Piston Ring, 5 – Rear Barrel, 6 – Load Advance Rod Assembly, 7 – Spool Cover & Rod, 8 – Strip Spring & Ball, 9 – Mech Housing & Spring, 10 – Firing Pin Assembly, 11 – Firing Pin Spring & washer, 12 – Barrel Detent Clip & Ball, 13 – Cocking Rod & sear, 14 – Front Housing & Retaining Ring, 15 – Advance Lever & Spring, 16 – Outer Housing, 17 – End Cap Assembly, 18 – Pawl Housing O-Ring, Pin, Spring, 19 – Pawl Assembly, 20 – Rubber Handle, 21 – Trigger Mech Pin & spring, 22 – Trigger Spring, 23 – Trigger Assembly