the spump im building right now (almost done)
made from scratch valve stem (need one without the flat milled on it)
milled the striker (not too terrible to do in a mill
freak bored the barrel
made a guide arm from scratch, but i wanna try one of my trilly to 2k+ adapters and see if i can put a standard wgp pump kit on it!
all thats left is a pump handle/sled/pump arm and she's done!
most of the stock spyder barrels make great freak bored barrels too... i've done a few in the past (inlcuding the one on my spump build)