if the strut is "caught" and the housing is almost closed, just keep pressure on the trigger, and tap the muzzle on a padded bench top ( we keep a piece of carpet remnent on the bench top) and bounce, tap, bump away, keeping pressure on the trigger till the hammer goes forward, may take a while but it works........... 8)
if the housing latch lever is out any, you can pull on that, wiggle tap, till it comes lose and backs off.. :roll: