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Safety: Firing pin lock, decocking lever, safety intercept notch, trigger bar disconnectorĪfter initial firing, the shooter can control the trigger reset either to an intermediate point with a shorter pull distance and two-pound heavier weight (the trigger bar intersects the hammer arm closer to the pivot point) or fully reset to the original longer and lighter weight position.Įxternally, the only visible difference between a SIG DAK mechanism and a conventional SIG DAO mechanism is that the DAK trigger has a slightly slimmer profile and the DAK hammer sits completely within the frame when at rest, while the DAO hammer protrudes slightly. Why deny yourself an 80-percent chance of solving the problem by a simple second pull of the trigger by requiring you to jack the slide with your other hand and chamber a completely different round? People who think this way will never be happy with a Glock (or similar mechanism), no matter how short and light the trigger pull. (What if the other hand is injured or otherwise engaged with the threat?) Such users also observe that it is a demonstrated fact that fully 80 percent of misfires do indeed fire on the second strike because the first hit served to solve whatever the problem was (a little crud in the firing pin channel, a not fully seated round, etc.).Ī misfire in a crisis situation is already a disaster. Many duty/defense pistol users believe it is ludicrous to carry a gun for life-protection if it requires two hands to operate should the trigger need to be pulled a second time in the event of a misfire. The initial point of choice for most purchasers seems to be repeat-strike capability. In the event of a misfire, you can keep on pulling the trigger until the round goes bang or you decide to manually clear the action and try a fresh one. Other designs like Taurus's compact Millennium and full-size 24/7 models are striker-fired, have an 8- to 10-pound full-stroke trigger pull, and have complete repeat-strike capability.
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Other DAO examples like the original S&W Third Generation auto pistols were hammer fired and had full-length trigger pulls in the 9- to 11-pound range but also required a manual rearward motion of the slide to partially cock the hammer and reset the trigger mechanism following a misfire (or dry-fire). Among well-known brands of DAO mechanisms the choices are extensive and confusing.įor example, the ubiquitous "safe action" Glock and the similar S&W Sigma are striker-fired and have very short trigger pulls (with an imbedded safety) that are lighter than the DAK trigger pull, but in the event of a misfire these designs require a manual rearward movement of the slide to "preload" the striker-fired mechanism before the trigger can be pulled again. Assuming equal reliability/durability/accuracy among prospective designs, how those three factors are weighed and ranked in importance will determine what particular pistol's action a prospective purchaser/user will like best. And the third is whether or not you can re-pull the trigger in the event of a misfire without needing to manually cycle the slide. There are three factors at work in deciding what type, and "feel," of trigger action an agency (or an individual) wants once they have made the increasingly prevalent basic decision to use a DAO (i.e., noncockable) pistol instead of a conventional double-action design. Lete repeat-strike capability, that is notably lighter than other full-length DAO pull mechanisms. So what is this DAK thing? And why are people making such a big deal about it? In bare-bones description, the DAK mechanism provides a hammer-fired full-length double-action trigger pull, with comp