This is a custom ALIENS Xenomorph. I combined the top half of NECA's Warrior Alien figure, and the bottom half of NECA's Isolation Alien figure.

My original warrior had severely warped legs and all the usual fixes didn't work. So when the newer Isolation figure was released with the bird-jointed legs (the Warrior just has normal human-jointed legs) I snatched it up. Both figures use the same base body, so I just popped the ball jointed waist apart and swapped the pieces. The lower half was originally brown so I had to do a full repaint to match the blue torso. I also smoothed out a few seem lines in the head, and replaced the neck joint with a better one to improve mobility.