Hello, ordered ten of the newest recoils springs for my two R9s,,they arrived this morning,one thing I observed, unlike the previous springs, both ends were finished off exactly the same, the former springs,were one end finished the other end unfinished,these on both ends were finished off exactly the same. Have others observed this? Also went to the gun range,with both guns, shot a total of 60 rounds . All flavors of ammo,Gold Dots,Federal,Winchester, etc,etc., the R9s ate it all up without any hiccups, whatosover. "Oh,Happy Day"