First off let me state that i have both and love'm although the AR is a constant companion of late. Well last night i was bored and was looking at my striders and noticed the AR is BG-42 and the BG is ATS-34, just wondering if they are all like that or what happened. Both of mine are from the first #ed 100. Keep up the great work guys, 7 plus the strider M2 surefire in my hands with more to come.