Bastion 4 Pin Kit For Glk Gen4 Sts

The Bastion 4 Pin Kit for Glock Gen4 STS is a precision replacement pin set designed specifically for Gen4 Glock models 17–41, excluding the model 36. This stainless steel pin kit addresses a critical maintenance need for operators and armorers managing Gen4 platforms: the replacement of factory pins that wear, corrode, or become lost during field operations. Each kit includes four essential pins—trigger housing pin, trigger housing pin for factory back straps, locking block pin, and trigger pin—machined from corrosion-resistant stainless steel for extended service life.

The stainless steel construction is mission-critical for shooters operating in environments where standard blued pins deteriorate: salt-air coastal duty, high-humidity climates, or frequent exposure to cleaning solvents and oils. Unlike inferior hardened-steel substitutes, stainless pins resist corrosion while maintaining dimensional tolerance necessary for tight frame-to-slide fitment. The inclusion of the dedicated back strap pin reflects Gen4's modular grip configuration, ensuring seamless compatibility whether the pistol runs OEM small, medium, or large back straps. Each pin is manufactured to OEM specifications to guarantee proper engagement with the frame's pin channels without binding or excessive play.

This kit serves pistol armorers, law enforcement departments managing Gen4 duty weapons, competitive shooters performing routine maintenance, and tactical trainers conducting high-round-count courses where pin wear accelerates. A single lost trigger housing pin or a corroded locking block pin can sideline a firearm for days—this kit keeps Gen4 platforms operational during critical rotations. The compact 0.06 lb weight and minimal footprint make it an essential backup component for range bags and armory shelves.