airsporter 's'(borrowed pic)
http://img265.imageshack.us/i/airspo...detailmd5.jpg/
my stock...
http://i1009.photobucket.com/albums/...9/STA61849.jpg
http://i1009.photobucket.com/albums/...9/STA61851.jpg
look closely at the chequering again......this is not an 's' model stock.
btw the chequering on the 's' model airsporter and merc were identical