The Wilson Combat’s Tactical Rail Interface, Modular (T.R.I.M.) rail provides shooters with a sleek, lightweight, free-floating forearm for their AR15 type rifles. The T.R.I.M. rail is constructed of 6005A-T5 aluminum, with a 4130 steel barrel nut and QD sling studs.
Left side view of the T.R.I.M. 12.6″ rail.Instead of simply boring into the aluminum, the QD sling studs are steel inserts.The T.R.I.M rail includes one 4 notch panel. 4, 6, 8, and 10 notch rail section0s are available.Installation begins by removing the six cap screws that secure the rail to the steel barrel nut.The barrel nut is threaded on both sides. Wilson Combat includes a shim in case you run into indexing problems. The barrel nut is tightened with a 1 3/16″ wrench, no specialized tools here.After mounting the upper into our vise with an action block, we slide the barrel into place. The barrel nut is then threaded hand-tight.We used an adjustable wrench to tighten the nut to the prescribed torque specification. The holes must index on the gas tube slot when the barrel is fully torqued.After the barrel is tightened we reinstalled the gas tube and gas block. In this case we are using a mid-length gas system. The 1.47″ inside diameter provides plenty of space for a gas block to be installed beneath the hand guard.After sliding the rail back on to the barrel nut, we align the top of the rail with the top rail of the upper receiver and torque the six socket screws to the appropriate torque spec.The installed rail looks slick, and handles well. The ability to add rail sections as needed, provides the basis for customization and task specific adaptations down the line.Left hand view of the T.R.I.M. rail installed on a 18″ Wilson Combat 7.62x40WT barrel.Fr comparison purposes, this is the top view of a Knight’s URX II (left), Wilson Combat T.R.I.M. (center) and Larue Tactical rail. Notice the Wilson T.R.I.M. is significantly slimmer then the URX II. It is also slightly slimmer then the Larue.Right side views of Knight’s URX II (left), Wilson Combat T.R.I.M. (center) and Larue Tactical rail.
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