A build aimed at beginners/individuals who don't have a lot of mods just yet.
NOTE You don't have to max out the high ranked mods like Hornet Strike. Just leave a couple from the top like rank 7-8. Should save you some endo and credit.
Temporary substitute: Use Pistol Gambit in place of Creeping Bullseye
[Creeping Bullseye] is from Orokin Vaults. Could be traded or farmed by doing any mission on Deimos. Make sure to have your dragon keys equipped if you wanna farm it.
Lethal Torrent is from nightmare missions. Do ones on Uranus, Neptune, Pluto, Eris, Sedna.
[Pistol Pestilence] is from Corrupted Vor. He spawns in any void mission about level 40. Mot is a good mission to farm. If he doesn't spawn within the first 5-10 minutes, extract and redo.
If you have Sharpened Bullets/Hydraulic Crosshairs then replace Augur Pact and downgrade Convulsion (Unless you want to forma the weapon again which is possible)
If you could spare the plat, get [Jolt] and replace [Convulsion]