• Produce by Airsoft Masterpiece, these firing pin springs are design for Airsoft Masterpiece advance frame.
• Each pack come in 2 springs.

Material : Steel

*PS: Please note: installing parts / assemble /fitting airsoft gun will need intermediate knowledge; for expert or airsoft gunsmith. Please refer to your airsoft gunsmith for proper installation / fitting. Fitting may be needed as the condition of each airsoft gun might be different. Regular maintenance is needed for all airsoft guns in order to keep it in good working condition and reduce wear out issue on parts.