After I got my SA Longslide, I sent the slide to Storm Lake Machine Co. in Tenn(?) and had them measure and fit to the slide a 6 1/2" comped barrel. Approx $250 for the barrel, link, pin, comp fitted to the slide. Feet were cut oversize for a gunsmith fit. Sent it back to SA to be fitted, so I wouldn't void the warranty. Custom shop did a fantastic job fitting the barrel. My only complaints were with Deb in the office. She almost doubled the quoted price then told me I didn't have to pay the new price, but " We have your gun" if I didn't.
Super job on the gun.My set-up is: stock main spring, EGW flat bottom firing pin stop, change firing pin spring fairly often, 20-24# recoil spring (depending on how hot my super's are). Tracy