OSS suppressor & MR556

[SperlingPE]

I don't see a suppressed weapons or SBR area, so I am posting here.
Has anyone used the older design 2 piece OSS suppressor on a 10" HK416 upper? Or cut down barrel?

 

[MEW]

I use one on an AR15 cut down, works great. Don't know why it wouldn't work on the HK

 

[AGG]

I don't see a suppressed weapons or SBR area, so I am posting here.
Has anyone used the older design 2 piece OSS suppressor on a 10" HK416 upper? Or cut down barrel?

Moving to HK Class 3 Talk--- may get better views there.

Tony