If you have a suppressor, you need a suppressor cover, especially if you shoot with a magnified optic. If you use an RDS like I do for many SBR applications, then you should want to be to able to quickly remove your just shot can off of your rifle. Cole-Tac makes one of the best suppressor covers on the market. I have two which I have been using for most than a year now and I can say without hesitation that they do exactly what they are designed to do, and they can be customized per order.
Gemtech G5t 5.56 Titanium Suppressor | Cole-Tac Suppressor Cover | Arisaka Defense Finger Stop
| Magpul Grip Stop
| Magpul PRO BUIS
| Geiselle MK8 MLOK Rail | Daniel Defense MK18 Barrel