It is easily the 500th time @Jefe has posted that. 
A note on quest rewards to save: I like to save the Deadly Bloom (the Overlooked: this is a test reward) and the Love Thumper (Best Mother’s Day Ever reward) for max level with my Gaige. With SiC those shields help DT put out more damage when he’s in play. Also the Flame of the Firehawk is a good one to save if you haven’t done the Cult Following missions yet, but I didn’t wait in TVHM because I wanted the exp.
Oh trust me I know 
I still use it frequently after all this time.
Slag Fibber, huh? Does the barrel type matter in that case?
Asking for a friend. (And again, that ‘friend’ is me. 
)
The ricochet barrel makes it Gaige’s premier gun. Because of the post-bounce split, all pellets get full damage instead of Close Enough’s 50% nerf.
I say slag for level 50 because it stays useful for longer than other elements.
How do you know which barrel you got?
For that you’ll just have to resort to the classic trial and error method: shoot and see. Make sure you’re near a wall and shoot at the ground.
But then you can’t get a different barrel of the one you get isn’t the one you wanted.
The shotgun barrel will have a “x1” beside the card damage ( a “fib” )
The ricochet barrel will have the highest damage : ~50000-60000 at level 50
The third barrel will have extremely low card damage : ~500
I’m not sure if you’re on a console, but as an X360 player you can just exit out of the game without saving it (making sure to enter and exit Ore Chasm before that), and then re-enter the game. It was by this method that I got what I deemed the perfect Fibber for the E-Techromancer (shock, and the ricochet variant).
(I will have to consider the slag ricochet variant for Gaigetrap though. Glad that was mentioned because I actually want a grenade mod that sinks teeth into health bars.)
Yeah I currently have the shotgun barrel and it’s hard to hit anything that is moving.
Also I forgot, the Redundant prefix will show x2 which is legit. It shoots two pellets at a time.
Just in case you might mistake a Redundant ricochet ( 50000 x2 ) for a shotgun ( 500 x1 ).
Would a redundant richocher fibber be good?
Sure thing. For this particular gun it would be, but for a Lady Fist, say, it wouldn’t ( as it makes crits harder to land which is mostly irrelevant with Gaige anyway ).
The chances of getting the element you want AND the prefix you want are minuscule. If I were picky ( and I am ) I’d prioritize a Hyperion grip over any given prefix but for a level 50, I’d take the first slag one I came across.
I personally prefer my Fibbers in Win-Win Flavor. 
Failing that (if elements and accessories can’t coexist), shock for E-Techromancer, slag for Gaigetrap.
I have a couple questions.
E-techromancer is the name given by @kawashiultimate on his Gaige with an E-tech weapons focused build.
Win Win is the prefix of Hyperion pistol with damage accessory.
Okay cool.
yeah, they have cool name for their toons. As for me the names i used are bland, like Maya OP8, Melee Zero 72, Farmer Sal, Krieg 72 Raids etc.
Shock Redundant Fibber with ricochet barrel would be my idea of perfection…
Thank you guys for all of the advice.