One of the most common issues on a 1911 is the plunger tube coming loose. The usual repair for this problem is to send your gun to a gunsmith to replace and re-stake the plunger tube. EGW's bolt-on plunger tube only requires drilling and tapping two holes under the grip. This is a do-it-yourself fix to a common problem. The screws are 4-40 and are included with the package. Installation requires inletting of the grip.