Recommended Use: Full-Size Frame (Government / Commander / Professional) 1911s in 9mm / .38 Super or .45 ACP shooting light target loads.
NOTE: This is the hammer spring we install in our full-size 9mm / .38 Super pistols.
CAUTION: The mainspring and other springs are under tension and eye protection should be worn for disassembly. We highly recommend our video #396 which demonstrates the proper procedure for replacement of springs. Failure to follow proper procedure could lead to bodily injury or damage to your firearm.