by Bob La Londe » Mon Jan 26, 2015 6:13 pm
If you have a local commercial hydraulic parts store like a Parker Store they will have viton o-rings in stock. Viton rings hold up pretty good. Urethane is even tougher, but they may be harder to source locally. Viton is plenty tough enough though.
CNC Molds N Stuff
http://www.cncmolds.com.177 XSB50
.177 Srod Reg-Extnsn-Prt .1405
.25 Srod Sprg & Hmr
.22 Hatsan 155
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.177 Plastic Daisy 880
.177 Crosman 760 Plastic Alu Spring Guide
.22 Crosman Model 1