Securing the plunger tube within a 1911 pistol frame is a critical process for maintaining the firearm’s functionality and reliability. This involves permanently deforming a small portion of the frame metal into a groove machined into the tube, preventing movement and ensuring consistent cycling. Specialized tools and careful technique are required to perform this operation correctly.
A properly secured tube ensures the smooth operation of the slide stop and prevents malfunctions related to feeding and ejection. Without proper securing, the tube can loosen under recoil, leading to decreased accuracy and potentially dangerous firearm failures. This procedure has been a standard practice in 1911 maintenance and customization for over a century, reflecting its continued importance to proper function.