the .25 barrels were green mtn. i believe. the .177 and .25 have really good reports for accuracy. the .22 were hit and miss. it will take some time but not rocket science. if any of you marauder guys are paranoid or just don't want to do it. i would be more than glad to chrony and tune your mrods for power/shot count, setup trigger, grease it, etc. for really cheap. i will provide some real time video and chrony strings. pm me if interested.
.25 Mrods are tuned for 3K fills Mike. It's the .177 & .22's that are 2.5K tuned.