1. Happy belated 4th birthday to the Silencer Sound Standard! In March of 2020, the PEW Science laboratory publicly launched the Standard that is used, worldwide, for objective analysis of suppressed system performance.

2. Sound Signature Review 6.147 – the Combat Application Technologies CAT/JL/A1. The CAT JL on supersonic .308. Technical discussion of this paper that was published last week. This addresses CAT SNIPER2 technology.

3. Sound Signature Review 6.148 – the Combat Application Technologies CAT/MOB/A1. The CAT MOB on the HK MP5. Technical discussion of this paper that was also published last week; this discussion addresses CAT DiVerge technology.