Colt 1911 Gov’t/Comm., 16lb mainspring. $13.97 ET111162 Eemann Tech Main Spring for Colt 1911, STI 2011 and clones. 16LB. Out of stock Category: Colt 1911 Related products 1911 9mm/.38s/.40sw Firing Pin, Black $32.97 Colt 1911 White Dot Sight Set, Series 80 $75.00