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A mod for the "BCAM-SD-34SC-1-A" that lets you use a fence post (or 42mm OD, 38mm/39mm ID tubing of some kind) to make a 37mm instead of the 34mm it was designed for. Same assembly, just use these instead of the four pivot parts and one "pump". If you do use a true 38mm bore, you'll likely need to mod rounds to fit, just sayin'.
LBRY Tags: 37mm; 38mm; c:disable-slimes-video
LBRY Tags: 37mm; 38mm; c:disable-slimes-video