The SOCOM model of the M1A rifle has a large following. Light, powerful and above all handy; it blends the attributes people are looking for in a carbine with a battle rifle cartridge. The new Delta P Design 5/8-24 SOCOM MODEL adapter addresses the need for a mounting system for muzzle accessories for this platform.
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One of the items of interest for many of the owners of this rifle is how to add muzzle accessories. One of the common things heard after firing one of these 16" 7.62 x 51 rifles with its muzzle brake is,"That was LOUD!". One of the barriers to adding suppressors, flash hiders, or other accessories to this platform is the lack of an available muzzle thread. The factory muzzle thread is a proprietary fine pitch thread. The fine pitch is required for the gas lock muzzle brake. The finer the thread the less it moves when unscrewed to line up with the gas plug. When the gas lock muzzle brake is installed, it threads up to shoulder against the gas cylinder. It must then be unscrewed whatever amount is necessary to align with the gas piston portion of the gas cylinder so that the gas plug may be installed. As the gas plug is tightened, the axis of the gas lock muzzle brake is pulled downward as there is no shoulder for it to register against. The amount of play available can vary given the tolerances of the threads and the distance the gas lock muzzle brake must be unscrewed to align it with the gas plug.
This works well with the factory muzzle brake where designers could account for this with tolerance in the bore of the factory gas lock muzzle brake. When trying to adapt other accessories not designed around this mounting system, it quickly becomes apparent that the misalignment found does not lend itself to good times. In short, the gas plug pulls the gas lock front sight casting off to one side, and the mounting threads and shoulder with it.
The 5/8-24 SOCOM MODEL adapter kit gives a mounting solution that will register directly on the barrel threads and the barrel shoulder. The kit is comprised of two basic items:
-A 5/8-24 adapter for the barrel threads of the SOCOM model M1A.
-A proprietary gas lock from sight for this application
After the factory muzzle brake is removed, the 5/8-24 adapter is installed. The matching gas lock front sight is then threaded on the outside of the adapter until it contacts the gas cylinder. The gas lock front sight is then backed off the minimum amount necessary to accommodate installation of the gas plug. A set screw is used to lock the gas lock front sight to the adapter and provide positive retention of the adapter through the gas plug. The gas lock front sight accepts the standard factory front sight.
The shoulder of the adapter is positioned just outboard of the installed gas plug to allow for accessories that would otherwise interfere with the gas plug. The adapter is made of hardened stainless with a proprietary high heat, matte oxide finish. The adapter 5/8-24 3A threads are close tolerance to match common industry standards. The adapter provides a full 13/16" dia. thread shoulder.
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