SPYDER XTRA : Straight feed load system, Rear cocking 2nd generation venturi bolt, Quick disconnect, field strippable t-pin, Dual sight rail with beaver tail, Bottom-line setup with Micro-Line hose, Two finger trigger with regulation trigger guard, Anti-double feed, Filter system, 12" Micro-polished muzzle brake barrel, Aluminum trigger frame, 45 grip frame with rubber grip cover, Tournament level velocity adjuster, Low pressure chamber, Newly designed cocking grip, Special blue anodizing,...