The Johnny Custom Glocks 4311 Drop-In Trigger System is a complete aftermarket firing system for Slimline Glock pistols, engineered to deliver a crisp, 1911-style break and fast, positive reset. Designed for Glock 43, 43X, 48, PSA Micro Dagger, CR920, and PF9SS platforms, this tuned system provides a consistent 3.5 lb trigger pull that balances control, safety, and shootability.

This model is ideal for shooters who want a more defined wall, cleaner break, and shorter reset for range work, training, or refined everyday carry setups. Each unit is assembled from dedicated aftermarket components and bench-tested in an actual pistol to verify trigger safety tab function, drop shelf engagement, and striker block operation, reflecting Johnny Custom Glocks’ focus on precision and reliability.

• Manufacturer: Johnny Custom Glocks
• Model: 4311
• Product Type: Drop-in trigger system and complete firing system
• Compatibility: Glock 43, 43X, 48, PSA Micro Dagger, CR920, PF9SS
• Trigger Pull: 3.5 lb
• Trigger Feel: 1911-style break with short, aggressive reset
• Included Components: Complete firing pin assembly, firing pin safety with spring, rear housing with receiver and connector, trigger bar and shoe