KWA M4 lower receiver. Great condition. Has been fielded 4 times. Shoot around 400 FPS. I’m pretty sure it shoots 25 rps on auto. The charging handle works when there is an upper on it. I can add on upper for an extra $50. We can do local if you live in Dallas/FT Worth area. I’m not trading unless it is a M4 sbr. Msg if you have any questions, but please only message if you intend on buying.