Here are two reseal kits that are correct for the Crosman 600 & 677 CO2 pistols.
It includes the most common O-Rings and the Quad-Ring that are needed to bring your
pistol back to life. Enough for two reseals. The kits include:
(2) Tube Cap Seal (White Urethane O-Ring)
(2) Hammer Seal (White Urethane O-Ring)
(2) Valve Body Seal (White Urethane O-Ring)
(2) Piercing Pin Seal (White Urethane O-Ring)
These white urethane seals are widely regarded to be of the highest quality and most durable available for your CO2 application.
(2) Transfer Port Seal (Quad-Ring)
(1) O-Ring/Seal Identification Guide (Identifies each seal, it's part number and where it is utilized)
(1) Exploded View With Part List For 600 & 677 - COPY (Not perfect but legible)
Thank You.