Just works - Tacfire AR15 M4 Style 6 Position Stock Kit

Mil spec tube, buffer is the correct weight. stock fits tight without binding, no wobble. The receiver endplate is kinda meh but I don't plan On using it anyway. The slotted sling attachment is floppy and the thread pitch is nonstandard so you cannot replace it with a different sling mount and use the same specialty screw that comes with the stock.