The BT-4 Players Parts Kit has all of the spare replacement parts you’ll need for your BT-4 marker.
Players Parts Kit Includes:

• 1-Ball Detent Assembly
• 1-Receiver Screw
• 1-Shock Absorber O-Ring
• 1-Rear Bolt O-Ring (Exterior Valve O-Ring)
• 1-Linkage Arm
• 2-Short Receiver Screws
• 1-Long Receiver Bolt
• 1-Drive Spring
• 2-Shell Nuts
• 1-Sear Spring
• 1-Trigger Return Spring
• 2-Valve Screws
• 1-Safety O-Ring
• 1 set of Grip Frame Screws