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Lb Gold Pin
Replacement AR Triggers
The immense market for AR-15 upgrades has driven manufacturers to extract the last ounce of performance from the half century old platform. Modern CNC machinery means that it is now economic to make precision mechanisms to very high standards in relatively small batches. The result is a plethora of AR trigger groups of which we will look at a few that use different approaches.
The Timney range of triggers offer very easy fitting through unit construction. The Timney AR trigger comes in a gold anodized drop in housing and the trigger itself is gold. In the AR-15 units this can be had in conventional or skeletonized format. As you would expect with a Timney unit, top quality metallurgy is employed. The hammer is wire-EDM cut from S7 tool steel and teflon coated and other components use A2 tool steel heat treated to Rc 56-60 and black oxide coated. The AR-15 and AR-308 units have 3lb and 4lb pulls respectively - the latter driven by the need to have a heavier hammer to give the strike needed by the tougher .308 primers. These units are easy to fit and require no gunsmithing. Only small pin receivers are catered for. They cannot be used on recent production Colts for example. The unit approach does make the unit harder to keep clean than a component or factor trigger. This really excludes it from use on service weapons or those used in any defensive role.
Rock River Arms' decided to take a component approach to improving the AR trigger. The Rock River AR National Match trigger economises on machining and makes for a lighter unit. As a result it takes a bit more time and effort to fit. The kit consists of a hammer, trigger, disconnect, and hammer and trigger pins. Rock River use improved geometry to deliver a lighter, smoother, more consistent two-stage pull than the factory unit. The sear engagement point has been put behind the hammer. This unit also only fits small pin receivers. This unit is available in 3.5lb., 4.5 to 5lb. and 5.5 50 6lb. versions. These triggers are assembled on a special rig and honed and tested until they are considered ready for dispatch.
The Accuracy Speaks AR trigger is an expensive trigger, particularly for a component unit, but one that delivers excellent performance. To look at it is very similar to the mil spec unit, but could not be more different from it in performance. An improved sear engagement angle makes a profound difference to the pull and let off. The unit is EDM machined from stainless steel which is then correctly heat treated to ensure a long a reliable service life. This unit differs from the other two in being adjustable from. However, this is not a drop in unit and some gunsmithing is recommended to achieve a correct fit. Both small and large pin receivers are catered for with specific models. The Accuracy Speaks AR trigger and the gunsmithing needed to install it are an investment in a quality product intended for serious competitive shooting.
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