Maccari-spelled wrong probably-has a "weaker than stock" spring on sale$20 I think I bought it with the SS front stock attachment bracket-also on sale-maybe $25(I can never resist a bargain)I just too the stock spring out-it is at least 4-5 inches shorter(they set THAT MUCH?)- should have measured it-but I didn'tWell tried to install new "weaker spring"WEAKER THAN WHAT?? I put most of my 170 lbs on the top of the action-I don't think it compressed 1 "Now maybe I just put 70 lbs on-but is the spring rate THAT HIGH 70LBS/INCH- or moreThere was some mention of presetting-tried to half @@@ that with a heavy cardboard tube and a long gluing clamp-only compressed about 1.5 "-and it did not actually seem to shorten AT ALLafter 24 hrs.So how-what tool-do I need to install this spring?And should a "weaker" spring be THAT LONG AND THAT STOUT?I think the add said it was .125" and maybe 30 coils-did not count or measureI might just stick with the stock spring-works fine-new-just chalk it up to "learned another lesson" LEAVE STUFF STOCK(cars motorcycles guns etc)