Colt 1911 Gov’t/Comm., 15lb mainspring. $13.97 ET111161 Eemann Tech Main Spring for Colt 1911, STI 2011 and clones. 15LB. In stock Colt 1911 Gov't/Comm., 15lb mainspring. quantity Add to cart Category: Colt 1911 Related products Colt 1911 Front White Dot Sight, Series 80 $40.00 Fusion 1911 High Impact Hammer, SS $90.00