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Bespoke CNC machined accessories and fittings for air rifles, pistols and firearms. Breech seal. Piston buffer. Piston ring. Mainspring. Feinwerkbau 300s Match service kit For pricing and delivery details, Please contact me via the contact page. The video above, shows how to strip down the rifle and replace the breech seal and piston buffer. Parts in development :- 3 way adjustable match trigger. Trigger guard. Butt spacer. INTERNATIONAL SHIPPING AVAILABLE ON ALL ITEMS Spare parts for the Feinwerkbau 300s Match air rifle available from stock:-