The FPM Gunworks Whistling Bunghole 5.56 / .223 Thread Protector 1/2x28 Black DLC is a compact, precision-machined accessory designed to safeguard your rifle’s muzzle threads when a muzzle device or suppressor is not installed. Built from durable 17-4 stainless steel and finished in a sleek black DLC coating, it offers a clean, low-profile look while standing up to hard use and frequent installation and removal.

This model is tailored for 5.56 NATO and .223 Remington platforms using the common 1/2x28 thread pattern, making it a practical choice for AR-style builds, range rifles, and general maintenance. With its short 0.90 inch overall length, it adds protection without unnecessary bulk, helping keep your barrel ready for whatever muzzle device you choose to run next. The careful machining reflects FPM Gunworks’ focus on quality, consistency, and thoughtful design in small but important components.

Key Features:

• Manufacturer: FPM Gunworks
• Model: Whistling Bunghole
• Caliber: 5.56 / .223
• Length: 0.90 in
• Thread Pattern: 1/2x28
• Material: 17-4 Stainless Steel
• Finish: Black DLC
• Product Type: Thread Protector