Airsoft Mike takes a break from his unboxing videos and does some airsoft tech time. This is an instructional guide for upgrading a Rare Arms AR-15 with a steel chamber. After the upgrade, he tests the rifle by firing a full 30-round magazine, noting that the new steel chamber makes a noticeable difference in sound. He also addresses a common criticism about the CO2 running out too quickly, explaining that proper installation with the steel chamber allows for more shots per cartridge. Additionally, he demonstrates a generic shell catcher but notes that it defeats the purpose of the shell-ejecting AR-15, which he purchased for use in movie production rather than for airsoft games.