Uploaded May 2026 | Updated September 2026, 1 hour ago

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In this sound/flash test video, Griffin puts the new M4SD-L™ AM Silencer up against the Knights Armament® QDSS-NT4®.

This test was conducted using the Bruel & Kjaer Pulse, lab grade sound meter and Phantom VEO 1310 High-Speed Camera System.

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Timecodes:
0:00 - Intro
0:14 - Specifications
0:48 - M4SD-L AM Flash Testing / 12.5" Griffin MK2
1:08 - QDSS-NT4 Flash Testing / 12.5" Griffin MK2
1:26 - 12.5" Griffin MK2 Unsuppressed Reference
1:48 - M4SD-L AM Sound Testing / 12.5" Griffin MK2
2:47 - QDSS-NT4 Sound Testing / 12.5" Griffin MK2
3:47 - Conclusion / Results

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"Knights Armament®" and "QDSS-NT4®" are federally registered trademarks of Knights Armament Co. Griffin Armament is an independent manufacturer that is in no way affiliated with or endorsed by Knights Armament Co. The demonstrations of the KAC silencer in this video is merely used for comparison to the Griffin Armament M4SD-L™ suppressor.