Friends in Low Places achievement in Fallout 76

Note: There has been a glitch discovered that ONLY WORKS ON THE RAIDER FACTION (As far as myself and others are concerned) but this does require a few small things before you can use it.....
1. Get to level 20
2. see the overseer and complete every mission till you have to meet each faction leader (Paige(Foundation/Settlers) and Meg(Crater/Raiders)).
Go to Meg (Raider Leader) and follow the video:
EDIT!: Thanks to another user a less time consuming way was discovered by abusing one of the "Daily quests" titled "Retirement Plan".
This method has now been patched as of 4/28 :(

There are a few other ways:
OverSeer's robot has a daily photo challenge: Go see him everyday and choose the opposite faction you want rep for. EX: If you want Foundation REP choose raiders, take pictures and give it to the foundation guy.

Random Encounters (2 Spots, just server hop (leave the game to main menu, click play, adventure), and repeat till you find the faction you want the rep for!

There are 7 Reputation tiers: Hostile (only the raiders will start in this one), Cautious, Neutral, Cooperative, Friendly, Neighborly, Ally.

Reputation: It takes longer to gain rep the higher you are in the "Tier list"
Here is the amount of time it took (yes i timed myself and I hate myself for that).

Cautious: -> Neutral (30 Minutes)
Neutral -> Cooperative (45 Minutes - 1 Hour)
Cooperative -> Friendly (2.3 Hours)
Friendly -> Neighborly (3.1 Hours)
Neighborly -> Ally (3.8 HOURS!)

This is if you quickly spam "A" and "B" at the right time without messing up.

That's pretty much it, I gave you guys a glitch for raiders (Personal Ammo producer is unlocked at ally and can help you out with foundations quests), and a video describing 2 locations to grind, and some tips.

I hope all of this helps! Good luck and happy grinding cause I HATE myself for getting this achievement.