The recoil spring assembly is discontinued according to Midway - Smith & Wesson Recoil Guide Rod Assembly S&W SW9945 SW990L45 (midwayusa.com)
Indeed, I called S&W and it’s discontinued without an ETA of if/when it might ever be back in stock.The recoil spring assembly is discontinued according to Midway - Smith & Wesson Recoil Guide Rod Assembly S&W SW9945 SW990L45 (midwayusa.com)