Nightly CM13 builds now available for some older, low-end LG phones
The nightly updates include new code added that day. It often is buggy, laggy and fraught with issues. You should make sure that you know what you are doing before starting the process, because one little screw up will leave you with a paperweight. On the positive side, these devices aren't expected to be updated to Android 6.0.
Check the sourcelink to grab the latest nightlies for each handset. After you download and flash the nightly builds, you will be well ahead of your blowhard neighbor who constantly brags how his high priced flagship Android phone will eventually get updated to Marshmallow. If you want access to Google Services including the Play Store, you will need to download the appropriate OpenGApps package.
source: Cyanogen (LG G3 Beat, LG G3 s, LG G2 mini, LG L70) via AndroidAuthority