Anyone buy this brand ?? i bought some pr3s from them asked for 81.5 , i got them and on the dome they have a .50 stamped on them but they sent me 81 mm hasting rings...well i have some 81.5 srps that im not gonna use with brand new rings from srp..my question is can i use those rings from the srps with my nippon pistons ???

 

sure why not, people use different brand rings on different brand pistons. I have used hasting rings on oem pistons, NPR rings on YCP pistons, etc.