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The Heat-Treated Castle Nut screws onto the AR15/M4 lower receiver extension (buffer tube) and keeps the receiver extension and lower receiver end plate secured in place. The large notches allow for positive engagement with a castle nut wrench for proper installation and torque. The smaller notches provide a location for the end user to stake the castle nut to prevent accidental loosening.
Finished in a Mil-spec manganese phosphate.
This stock uses Ace original soft foam overtube for the ultimate cheek weld. A billet machined gusset reinforces the receiver extension tube at its weakest point directly behind the receiver. Precision machined aluminum butt clamps directly to the RET and provides a machined in sling mount.
Ace's skeletonized stock for the AR-15 rifle. Closed cell foam overtube provides an extremely comfortable cheek weld. Uses A2 buffer tube, rifle length buffer and rifle length buffer spring (NOT INCLUDED). Foam overtube, buttpad and all needed mounting hardware included. Length 10" Weight 11.2oz
