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Double-action – firearms trigger: Pressing the trigger 1) cocks, and 2) drops the hammer. The hammer can also be cocked to fire in single-action (SA) mode. With a DA revolver, the hammer can be cocked first (single action), or the trigger can be pulled and it will cock and release the hammer (double action). [1]
A double-action trigger, also known as double-action only (DAO) to prevent confusion with the more common hybrid DA/SA designs, is a trigger that must perform the double function of both cocking and releasing the hammer/striker.
Most modern double-action revolvers have an internal safety, either a hammer block or a transfer bar, that positively prevents firing without the trigger being pulled. The only modern double-action revolvers with external safeties are unusual cases available only on special order or modified through aftermarket conversions. [24]
Sear shown in a revolver action Sear (B), in a rifle. In a firearm, the sear is the part of the trigger mechanism that holds the hammer, striker, or bolt back until the correct amount of pressure has been applied to the trigger, at which point the hammer, striker, or bolt is released to discharge the weapon. The sear may be a separate part or ...
A break action is a type of firearm where the barrel(s) are hinged and can be "broken open" to expose the breech. Multi-barrel break action firearms are usually subdivided into over-and-under or side-by-side configurations for two barrel configurations or "combination gun" when mixed rifle and shotgun barrels are used.
Because the striker is only 98% cocked prior to the trigger being pulled, Smith & Wesson classifies the M&P's action as "striker fired (double action only)". [5] [6] The M&P factory trigger is of the jointed type and has a trigger travel of 7.6 mm (0.3 in) and is rated at 29 N (6.5 lb f).
A view of the break-action of a typical over-and-under (O/U) double-barreled shotgun, with action open and the ejectors visible Two .410 shells being loaded into a side-by-side, double-barrel shotgun A double-barreled shotgun , also known as a double shotgun , is a break-action shotgun with two parallel barrels , allowing two single shots that ...
The weapon features a patented double-action ball bearing trigger system. [ 1 ] [ 6 ] Additional features include a lightweight aluminum frame and a hammerless, no-snag design that make the DoubleTap easy carry and draw from a pant pocket, [ 6 ] and also allows it to be fired through a coat or jacket pocket.