New releases

★ ★ Bullet to the Head Hardly a noted cutup, Sylvester Stallone is surprisingly funny playing an irascible New Orleans hit man paired with a cop (Sung Kang, “Fast Five”). It’s a trick Stallone pulls off by not trying too hard, and generally just looking annoyed to be here. If “Bullet” had anything else going for it, it might be a little more than just the grungy revenge flick of the week. (92 min., R) (Tom Russo)