Millersville MMA - 3rd Degree Brazilian Jiu Jitsu (BJJ) Black Belt, Jon Garfield, shows a closed guard armbar when the initial armbar fails. The technique in the video can be used in Gi and No Gi Brazilian Jiu Jitsu (BJJ) and Mixed Martial Arts (MMA) competitions. Visit the above website for additional information! br br Garfield Martial Arts br 657 Old Mill Rd, br Millersville, MD 21108 br (410) 260-0353 br br br GarfieldMMA.com br Facebook.