sentences:  The Mauser tended to be considered the most developed (or mature) in terms of mechanism, featuring a reliable action protected from the elements, manual safety, and a hold open indicating the last shot had been fired and easily convertible to carbine form, however the pistol had reached its developmental peak.The Luger, like the Colt, in 1902–1907, was not yet refined, although it was not only beautifully made, but it was ergonomically classic.The Colt was ergonomically the opposite, having poor balance and a crude grip, it also lacked safety mechanisms (the abandoned and unpopular sight safety was exchanged for no safety at all), and was considered more open to the elements.