Airsix TV goes over the RST SI SMP Steel Slide and Out Barrel set which is a high-end airsoft upgrade designed to fix the poor reliability of the base VFC SI SMP pistol, which the he notes quickly becomes unusable in its stock form. The upgrade set uses real-steel materials and finishes, including 17-4PH stainless steel with H900 heat treatment and Black Nitride for the slide, and SUS 416R stainless steel for the outer barrel, ensuring high durability and a realistic look.

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.