Just search for “takedown bag” on Amazon. I have the Savior bag. I like it as it will fit my 16” ARs if I disassemble them. The only thing was one handle broke recently but I’ve had it for about a year and and in its defense I always overload it with weight.
Yup, just smug!
Savior Equipment Urban Takedown... https://www.amazon.com/dp/B07RZMDY15?ref=ppx_pop_mob_ap_share
Savior Equipment Urban Takedown... https://www.amazon.com/dp/B07RZMDY15?ref=ppx_pop_mob_ap_share