Mach Sakai reviews a classic-looking gas blowback M4A1 rifle equipped with the Tokyo Marui MWS system. The review covers various aspects of the rifle, including its packaging, instructions, overall length, weight, and the method of installing a silencer. Sakai also examines the front and rear sights, handguard, engravings, and charging handle.

He tests whether the magazine falls due to its own weight and measures the trigger pull. The grip and stock are also evaluated. Sakai demonstrates the normal disassembly and assembly of the rifle, the process of gas injection, and how to insert BB bullets. He conducts a live fire test with the M4A1, assessing gas consumption and measuring the initial velocity.

The review includes a Steel Challenge Roundabout, adjustments to the hop and sight, and concludes with an APS Cup Bullseye.