Shotgun Scabbards and the Sawed-Off variety

[DemonOmenIII]

Just out of curiosity, was wondering if anyone had one of those shotgun scabbards that ive seen floating around. says they attach to the back of your molle vest quite nicely. my concern is the length of these, i have a maruzen ca870 that i use as my secondary. the sling on it makes it rattle aroudn and swing every which way. if i had that scabbard, would i be able to easily equip and unequip my shotgun? (reach over the shoulder draw it out, put it back yadda yadda) can anyone back up the possibility of this.