:shock: That RWS website is talking about the breech seal NOT about the piston seal. You can get it apart without a spring compresser but you will probably damage something. You will not get it back together without a compresser. MarshDieselnutts said:On the RWS web site it says that changing the spring and seal is very
simple "owner friendly".
http://www.dnrws.com/maintenance.html
Jamie