Airsix TV reviews RST SMP steel slide set, which includes a slide and outer barrel, emphasizing its high-quality construction. The slide is crafted from 17-4 PH stainless steel with H900 heat treatment and a black nitride finish, accurately replicating real-steel specifications and featuring precise engravings. The SUS 416R outer barrel also includes a guide for smoother action.

Testing showed the slide provided excellent, strong recoil and reliable function, managing over 100 continuous shots with gas. However, the reviewer stresses that due to inherent issues with the base SMP model, a separate "Performance Kit" (containing parts like the hammer spring and sear) is essential for achieving stable and reliable long-term performance with the heavier steel slide upgrade.