What is a BUFFER TUBE?
This video from GUNBROS explains the function of a buffer tube on an AR-15 or AR-pattern rifle. As demonstrated by the instructor, the buffer tube is attached to the lower receiver and houses the buffer and spring. When the rifle fires, the bolt carrier group compresses this assembly, which then returns forward to chamber the next round. The video emphasizes the critical role of the buffer tube in the AR-15's operating system.









