If dedicated rifle stands are silly money, look at these:-
http://www.amazon.co.uk/Konig-SAT-TR...5206169&sr=8-1
I just bought one for my travelling satellite dish. It's solidly made of aluminium and the legs spread very wide for excellent stability. It wouldn't take much work to extend the vertical post and put a platform/shelf/stirrup on the top. It folds down to approx 5" x 5" x 36"
Walther CP-2 Match, FAS 604 & Tau 7 target pistols, Smith & Wesson 6" & 4" co2 pistol, Crosman 1377,
Baikal IZH 53 pistol, Gamo CFX Royal,177, Umarex SA-10 CO2 pistol.