I only have one Glock, a Gen-4 21 in 45 ACP. I purchased it used from a local LEO who said it had less than 50 rounds through it. Came with six magazines, Wolf threaded barrel, night sights, all the removed factory parts, and a Johnny Glocks carry trigger that averages 4 pounds. I haven't had many opportunities to fire other after market triggers in either the M&P or Glock versions, so I'm certainly not the opinion to trust. Having said that, I really like the trigger. Smooth, clean break, positive reset. Others may be better, but this one will not get changed out.