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Sear shown in a revolver action. 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.
A Crosman air pistol trigger mechanism, unmodified (top) and with a sear engagement adjustment (bottom). An adjustable trigger may have ways to adjust all of these stages, plus trigger location. For example, a first stage or takeup adjustment might include weight and travel, a second stage or sear engagement adjustment might include weight and ...
The trigger pull can be divided into three mechanical stages: Takeup or pretravel: The movement of the trigger before the sear moves. Break: The movement of the trigger during the sear's movement up to the point of release, where the felt resistance suddenly decreases. Overtravel: The movement of the trigger after the sear has already released
Gunblast's SR40 example was rated with a trigger pull of 29.5 N (6.6 lb f). The difference in trigger-pull is most likely due to variances between individual guns, and not to a change in specs by Ruger between the models. [9] [7] [10] The trigger travel is 7.8 mm (0.31 in). The SR9 is recoil operated with a locked breech.
A trigger disconnector captures the hammer in the cocked position after a shot has been fired, even if the trigger is held to the rear as the gun cycles. This ensures the gun can only fire in the semi-automatic mode, as the trigger needs to be released to 'reset' and have the disconnector release the hammer back to the trigger sear.
SR1911: features a full length 8.67" slide with a 5" barrel, a standard magazine capacity of 8+1 and a weight of 39 oz. Constructed from low-glare stainless steel.; SR1911 Commander (SR1911CMD): has a shorter overall length of 7.75", shorter barrel length of 4.25", reduced magazine capacity of 7+1, and lighter unloaded weight of 36.40 oz.
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The Ruger #3 is a single-shot rifle produced by Sturm, Ruger & Co from 1973 to 1986. It is based on the Ruger #1, with some modifications made to reduce costs, such as a simpler one-piece breech lever. [3] It also was shipped with an uncheckered stock and a plastic buttplate. [4] It has been described as "superbly accurate". [5]