MR556A1-SD Suppressed
SD = German (Schalldämpfer), which means suppressor. Equipped with Operators Suppressor Systems Inc. (OSS) Back Pressure Regulator (BPR) and a Signature Reduction Module (SRM). Introduced 2014.
NIB$0000
Excellent$0000
Very Good$0000
Good$0000
Fair$0000
Poor$0000