I tried a different loadout two nights ago, replacing my venerated Hologram with the Single Shot on my Grendel.
So the primary is like this:
Grendel, Red Dot Sight, Suppressor, Single-Shot.

My problem is this:

When I switch from burst-fire to single-shot the suppressor vanishes and my shots are no longer silenced. I switch back to regular (burst) fire and the suppressor is back again, doing what it's supposed to do. Switching back and forth, always the same result.
Single-Shot: NO suppressor, loud gunshots.
Regular Fire: Suppressor, silenced gunshots.

Am I alone in this? Is it supposed to be that way? Is it a bug? Is it my fault?


I'll try to get a video if I can...

Its not, its an in game bug, I picked up a Grendel silenced and put it on single shot and it wasn't supressed. Other people have had this problem too.

Thanks.

Well, now I feel somewhat stupid. Turns out that if I had searched for "grendel suppressor" instead of "grendel silencer", I wouldn't have had to ask this question.

Sorry.

At least now I know it's a multi-platform bug, on Xbox 360 and PC. Really strange.