I like RxArms products, but I did have their charging handle "fall" out while pulling back on the bolt (I noticed I was slightly pulling outward while pulling back). The OEM does not have this issue, so I've decided to swap back to prevent an inadvertent lost charging handle.
It's a solid product, just not for me. I haven't shot with it yet. I have it currently listed on GAFs (Reddit) for $340 shipped. The heatshield, cap, rmr mount, mlok matchsaver and hardware will be included. DM me here or through Reddit if interested.
https://imgur.com/a/duJIfe1
Looks like the M1 M2 M3 and M4 use the same one. It's listed as such on https://www.benelliparts.net/products/benelli-m4-m1-m2-m3-large-bolt-release
Good find.
Mine took almost five months due to an injury they sustained, which prevented them from working for a while. They take some time, but they are well worth the wait.