Mach Sakai does a performance test of the VFC FN Mk20 SSR Gas Blowback Rifle (GBBR) Japan Edition. He introduces the rifle, noting its substantial weight of 4.46kg and its adjustable length, which extends up to 107cm. He also covers the rifle's parts, including the 20-round magazine and the design of the long outer barrel.

The rifle's features are examined, highlighting the fully adjustable stock, which has both seven length adjustments and six height adjustments. He demonstrates the adjustable iron sights, the ambidextrous magazine catch, and the smooth bolt release. The trigger pull is also tested, registering at approximately 2,198 grams, and the reviewer notes the clean break.

During the live-fire session with a scope mounted, the primary focus is the rifle's strong, metallic, and heavy recoil, which is described as challenging but highly satisfying to control, especially during full-auto fire. Although initial accuracy tests showed shots flying high due to a hop-up set too strongly for the light BBs, the overall verdict is that the VFC Mk20 SSR is an impressive and enjoyable airsoft gun defined by its powerful and dramatic blowback action.