AR-15 Castle nut Cover (Mil spec buffer tube)

This is a cosmetic Transition from castle nut to buffer tube (Mil Spec). Servers n other purpose. but adds a little styling. Screw and nut if needed (Mine stays with friction) 5-40 x 1/2" screw and nut.

My other things seen here
Mag Well Grip - http://www.thingiverse.com/thing:2224258
Clamp on Stock - http://www.thingiverse.com/thing:2214811
NY Legal GRIP - http://www.thingiverse.com/thing:2067574