I don't know how it works in fivem, I only know for LSPDFR. But try look in the rar files for DDM4V7 there should be a tutorial on how to spawn it for both Fivem and LSPDFR.
Hey, sorry I didn't respond to you sooner, these animations arent in the TLS DDM4 pack, they are custom poses that you can find on gta5.mods or if you want me to Ill just send you the link https://www.gta5-mods.com/misc/custom-rifle-poses-add-on
Hey guys, sorry for not responding to your message, I am gonna post the new version. (Also a new item in TLS is out I will make sure to get that for you guys)