This specialized instrument is designed to secure the plunger tube within the frame of a specific firearm model. It ensures a tight, permanent fit, preventing movement that could affect the weapon’s reliability and accuracy. Typically, the process involves precisely deforming the metal of the frame around the tube, creating a mechanical lock.
A properly secured plunger tube is essential for consistent function. Loosening can lead to malfunctions, including failures to feed or eject cartridges. Historically, improper fitting has been a common issue addressed through this specific process. Maintaining correct alignment and tension is crucial for the firearm’s longevity and safe operation.