The developers release a new gun every week. Modded APKs are rarely updated. After one month, your mod will be obsolete. You will miss out on new features, bug fixes, and especially the recently added guns (like the SIG MCX Spear or the RM277).
: In the official free-to-play version, most guns are locked behind experience points (XP) or credits. Unlocking everything naturally can take months of consistent play. Review of the "Unlock All Guns" Mod APK --- World Of Guns Gun Disassembly Unlock All Guns Mod Apk