Sorry couldn't remember your name or username. Talked
Realtor
range day, We discussed your broken sig piston and how SIG blows and will not warranty their own stuff. I think I found you a replacement. Not sure if you told me the exact model or not. So might want to call them and make sure it's compatible.
SIG 551 Gas Piston and Recoil Rod Assembly
www.gatewoodsupplyco.com