Big plat

Here you go..sorry about the pictures..

As far as I can tell this is a older factory upper…I am looking for a lower that this upper will work on..is there any aftermarket S&W lowers? 16” 308 win 5R barrel 11.5 gas tube the gas tube is in the middle of the cam pin cutout

I have a Smith & Wesson AR308 win 1/10 5R complete upper with bolt carrier group and charge handle. I am trying to find a lower that is comparable with my upper having trouble? Or does that S&W upper only fit on a S&W lower??? Thank you for your help

I have a 308 win 1/10 5R Smith and Wesson complete upper with carrier group and charging handle. I I am trying to find a lower that will work with this smith and Wesson upper or will this complete upper only work with a smith & Wesson Lower??? Thank you for your help