Spare magazine / mag for the Smith & Wesson M&P 40 air pistol by Umarex. Suitable only for the M&P 40 NOT the M&P40 M2.0 or M&P40 TS – please check image.

4.5mm steel BB

Holds both the 18 BBs. Makes a great edition to the rifle as you can have a spare magazine waiting for a quick reload, so more time can be spent shooting!