Airsoft Masterpiece S-Style 3.9 160mm Aluminum Advance Frame for Hi-Capa GBB Pistols, Red

The S-Style 3.9 is an aluminum frame for Hi-Capa gas blowback pistols. If you are running a Tokyo Marui, WE Tech, or similar platform and want a more substantial grip with better durability, this is the upgrade. The frame measures 160mm, giving you a full-sized grip without the bulk of a 5-inch competition build, which is useful if you want better control but still need to clear tight spaces or draw from a holster.

Material and feel. The frame is machined from aluminum, so it adds real weight to the pistol and resists the wear that polymer frames show after heavy use. It does not flex under recoil the way cheaper frames can, and the CNC finish holds up to repeated holstering and field abuse. At 90 grams, it is noticeably heavier than a stock polymer frame, which shifts the balance forward and can help mitigate muzzle climb during rapid fire.

Fit and compatibility. This frame is designed for the Hi-Capa platform and fits Tokyo Marui, WE Tech, and other similar gas blowback pistols in that family. The machining tolerances are tight enough that the slide mates cleanly without play, and the trigger guard and grip angle match the original geometry so your grip and trigger reach stay consistent. Installation is straightforward: you are swapping the entire lower receiver, not bolting on a grip panel, so expect to transfer your internal parts over to the new frame.

Before you buy. This is a frame only—the package does not include a slide, barrel, or internal components. You are upgrading an existing pistol, not building one from scratch. The red anodized finish is cosmetic and does not affect function. If you are looking for a lightweight training pistol, this is not it; the added weight is part of what makes it durable, but it does change how the gun carries.