Editing Open bolt (section)

==Advantages==
Compared to a [[closed-bolt]] design, open-bolt weapons generally have fewer moving parts. The [[firing pin]] is often part of the bolt, saving on manufacturing costs; the inertia of the bolt closing also causes the fixed firing pin to strike a blow on the primer, without need for a separate hammer/striker and spring. In automatic weapons, an open bolt helps eliminate the dangerous phenomenon known as "[[Cooking off|cook-off]]", in which the firing chamber becomes so hot that rounds spontaneously fire without trigger input. Open-bolt designs typically remain much cooler in operation than closed-bolt types due to the airflow allowed into the chamber, action and barrel during pauses between bursts; moreover, unlike in the case of the closed-bolt format, the initial round in a burst is not introduced into the chamber until the moment before firing, and is thus only exposed to the residual heat for a fraction of a second. These two features combine to make open-bolt operation more suitable for weapons such as [[machine gun]]s, which are intended to be capable of prolonged automatic fire. Open-bolt firearms also allow water drainage in [[underwater firearm]]s.