Bought a Skan with a broken delrin bottle adapter. Called Mike and he said he had one left but in steel. He wanted 250 Br Pounds!! OUCH. Got my machinist to make one. BTW tried all kinds of elastics for the mags but was never satisfied. Decided to try orings. 1.78cs x 25mm id work great. Longevity not sure. Next id size up may also work