Wolff Government Model Variable Power Recoil Spring 9-20 lb Government Model 1911

WOLFF Government Model Variable Power Recoil Spring for the Government Model 1911 slide. Variable-rate springs function over a wider range of loads than fixed-rate springs. The rate increases as the spring is compressed, providing greater protection against frame battering, more consistent lockup, and improved feeding, while allowing easier manual cycling of the action. Available options include weights from 9 to 20 lb. Recoil Calibration Pak contains one of each of seven springs: 16.5 lb, 15 lb, 14 lb, 13 lb, 11 lb, 10 lb, and 9 lb, plus three extra power firing pin springs. Individual Spring Pak contains one variable power recoil spring and one extra firing pin spring. Factory weight is 16 lb.