thanks for comments. so why would they ship the gun with another/extra main spring. didn't know they went bad? maybe an extra recoil spring,but not a main spring. so,i assume 18lbs. is the stock MS wt? so,can you buy a 15-16lb? still don't know for sure the recoil spring wt. just trying to eliminate buying a bunch of springs i don't need,not to mention they have to be ORDERED,not just picked down the street. that is a strange deal on the barrels. it does not look any different after i shot a 100 rds thru than it did when new. it looks like someone threw a handful of sand in the slide and took it out and ran it hard. scratched and scraped barrel hood and the barrel channel in the side. kinda ugly,but no harm,no foul,i guess. so,would a 11-12lb recoil spring be close for my 127pf with somewhat fast burning powder. will the somewhat newer Mec-Gar 17rd afc mags work ok in the SHADOW? thanks again.