Yes. Downloading APKs of free apps for personal use is legal. However, modifying the APK or bypassing paid features is not.
: Provides a version history where you can filter and download older Messenger builds. How to Install the APK Facebook Messenger (Android 4.4+) APKs - APKMirror facebook messenger apk for android 4.4 2 free download
Even if you install a compatible APK, the app may eventually block you with a "force update" screen that cannot be bypassed because newer versions won't run on your hardware. facebook messenger apk for android 4.4 2 free download
To download Facebook Messenger APK for Android 4.4.2, follow these steps: facebook messenger apk for android 4.4 2 free download
Android operating system versions that support the Messenger app: Version 5 (Lollipop) and above.
After downloading the APK: