FN250A finish nailer will only shoot one nail then has to be manually reset
Could be caused by bent driver, piston oring too tight or too loose cylinder split or check band broken or slipped out of place. Easy to check. Remove the head and pull out the cylinder. Check band fits around series of very small holes on mid-lower part if cylinder. Check band looks like rubber band, should fit snugly around cylinder and cover the small holes (any band will do if broken, even many orings side by side). Driver should not be bent, if bent, try of adjust but use caution because it could break easily. The driver should fit into cylinder so that it does not fall thru cylinder under it's own weight. The driver should stay in place and moved with little effort. Good luck
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