M1 Carbine Recoil Springs

I have a '78 Iver Johnson (Single) Operating Guide Spring, Now everyone here that knows me and about my Iver and how i got it. Some guests tell me there was never an Iver with one Spring, just thought i mentioned it cause it still amazes me, but i seen some M1 Carbine X Power Springs and im sure you saw them also. These just have to be GI Springs Correct, cause when i took out the Operating Guide Spring from my Iver it was almost a 1" longer than the GI Springs, so i replace it with a GI Carbine Spring and the action was better, alot better when i took it down the road to try it. But whats up with GI X Power Spring. Thanks

Frank

I use NOTHING but USGI recoil springs on Carbines..... Sarco used to sell a "high speed" recoil spring that SUCKED!!!!

I was down to my last one, but i ordered 3 more today from the same place that i had gotten them before and where actually just a bit, tad or hair smaller than the used GI Spring. Now im going to put one in my Iver when its done being converted to the GI overhaul its going through, Thanks

Frank