3:17 Most people know about the speed burst, but many forget the weapon swap is also increased by 10%. 4:37 Sniper Expert also increases lung capacity even though the description only mentions weapon sway.
For the hip fire mod, you can also shoot a vehicle to get the better accuracy when hip firing. So instead of waiting to damage the opponent before getting better accuracy take a couple shots at a vehicle nearby if possible and you'll start out firing with the bonus instead of having to wait until you damage the enemy.
I use mac10 + fast ads+ precise sh + extended mag gives me 83 round clip and I use an ar or lmg + extended mag + lateral recoil + vertical recoil In battle royale I’m in the leaderboard with my Mac from br dubs
better get your words right because they are no secret or normal effect. each legendary mod has a passive and active effect which you just demonstrated. you can also read these in the mods tab in BR loadout section.