Airsoft Chay reviews the APFG MPX, an airsoft version of the SIG MPX. The replica features a CNC aluminum upper, a diecast aluminum alloy lower, and a Midwest Industries handguard. The video highlights the replica's accurate replication of controls, durable paint finish on the upper, and less durable finish on the lower. The reviewer also discusses the internal components, gas efficiency, and performance, noting some common issues like fragile muzzle thread and over hopping, but praising its overall practicality and fun factor.