>>10096420Series 1 had stiff joints and required hot water or a hair dryer to free up. They fixed those issues with series 2 on. The vests pegs were a weird shape and are a pain to re-attach without using heat and/or stretching the peg holes. They re-designed the vests on all series 3 and re-issues going forward. I own series 1 Sgt. Slaughter, Trigger, and Night Ops Steel Brigade. They're superior to GIJ Classified in in paint apps, realistic weapons, and articulation.