Well, I was going to make a thread about this in the appropriate forum, i.e. the subforum about technical bugs so it got noticed properly, but this happened to me as well when I put a silencer on my Weathered 10mm pistol.
I took screencaps.
PC version.
Sorry for a short bit of off-topic, but I'm new here, and I'm just wondering why everyone posts bug stuff under the General Discussion when there's a proper subforum, like you said. Seems like common sense to me. But then again, I see common sense less and less every day (especially on the internet).
Back on topic: I haven't tried to mod my DLC gun, but I won't bother trying. Thanks for the heads up.