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The M4 Tactical Adjustable Collapsable Stock Kit comes with (1) pistol grip, (1) pistol grip nut and (1) buttstock.
The Benelli M4 as well as Panzer M4, have the different stock positions machined into the buffer tube, fully collapsed, mid position and fully extended, most other clones as well, just an amazing upgrade.
Some Benelli M4 clones have a smooth buffer tube (no locking notches). Please remove the factory stock from any Benelli M4 clones to assure the buffer tube has the required locking notches before purchasing this stock.