Welcome to the official Common Sense Self-Defense / Street Combat site. Founded by Grandmaster Bram Frank, CSSD-SC has been the hub from which he has promoted his Combat Arnis and Modular systems, along with his knife designs.

What are your CSSD goals today?

We are now offering the ability to earn a Basic Instructor Certification in Modular Knife. The course is comprised of video training and one-to-one video access with Grandmaster Bram Frank and a test by video for the final exam. CLICK HERE

We are proud sponsors of Meet the Pressers podcast with Matt Mallory and Klint Macro.

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Update your Information

Are you or have you been a CSSD instructor? Have you, at any time taken our courses in Combat Arnis, Modular Knife or CRMIPT?  If this is you, please take a moment and fill out the form via the following link.  We are in the process of updating our database.

CLICK HERE to fill out the form

Pre-Order New Knives

Introducing the Sister Christian and the Kopesh…

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Miss the last podcast GM Bram Frank was on? Watch/Listen to it here…