Talk:MGR-L1 Promise/@comment-174.7.6.31-20180228083053/@comment-81.157.16.194-20180301075029

Find a med-to-large battle and go to the gun, click "unlock" and then click "trial". You now have the gun for free for at least 30 mins (unless you can live for longer once the times up).

With luck, this will give you some idea.