Description: This Lone Star build offers great DPS and it's meant to be run with dual LMGs.You can run it on any activity in the game.
Primary Weapon: The MG5 offer the best balance between damage and RPM among all LMGs and it's pretty easy to control, even when Berzerk is active. This build has the ability to unlock all the great PvE talents. Destructive, Ferocious and Determined in the primary MG5 is great to get your skills or signature ability back.
Secondary Weapon: The secondary MG5 uses Destructive and Ferocious but Predatory instead of Determined. It will help you stay healed when you get kills and it complements the switch to reload mechanic of Lone Star. Basically you're cycling between Determined and Predatory between the two weapons.
Alternative Weapons: The Big Alejandro is a good choice but you need to rely on being in cover. It can be used reliably in Resistance, Falcon Lost, Dragon's Nest. For other activities, the MG5s are better since you will be on the move constantly, wasting its exotic talent.
Pistol: With Toxic and Coolheaded you can switch to your pistol in a hurry. Toxic helps with crowd control and Coolheaded will help you get your skills back. It will be rarely used in this build since you reload by switching your primary and secondary but it's nice to have for other builds.
Skills: You can run any skills you want. Overdose is the best to heal yourself and Flashbang is a great crowd control skill. You can choose to run Gas Seekers if you prefer. Tactical Link can be used pretty often while Determined on your weapon. It's to great to complement group play since the majority of random groups will be running Recovery Link.
Character Talents: Critical Save helps you resist a bit of damage if you use a medkit in a hairy situation. On the Move goes well with Lone Star play style. Combat Medic is a must in group play, everyone should use it. Strike Back can help you while low on health.
Character Talents for Solo: Critical Save, On the Move, Precision, Strike Back.