SilencerCo Delta Thread Protector | 1/2×28 | AC6

The SilencerCo Delta Thread Protector is designed to safeguard external barrel threads when a muzzle device or suppressor is not installed. Machined from stainless steel and finished in black oxide, it uses an O-ring engagement feature for positive retention without risking cross-threading when installed correctly. The unit is specified for a 1/2×28 tpi interface and is associated with .22 LR configurations in the manufacturer data. This protector is intended for transport, storage, and range use when a muzzle device has been removed.

Product Specifications

• The product type is Thread Protector.
• The model is listed as Delta.
• The thread pattern is 1/2×28.
• The size is specified as 1/2×28.
• The material is Stainless Steel.
• The finish is Black Oxide.
• An additional feature is Thread Protector W/ O-ring for positive engagement.
• The series is Thread Protector.
• The listed caliber/gauge is .22 LR.
• Compatibility notes list Switchback 22, Sparrow 22, Spectre 22, Warlock 22, and Osprey Micro 22 in manufacturer materials.
• The manufacturer part number is AC6.
• The NFA thread pattern is 1/2×28.
• The UPC is 817272010138.

Compact, corrosion-resistant, and built for repeatable installation, the Delta Thread Protector provides a low-profile barrier that keeps threads free of dust and debris between uses. Its stainless construction and black oxide finish balance durability with subdued appearance, and the O-ring engagement reduces the chance of accidental loss while remaining easy to remove by hand. For users who remove a muzzle device for transport or storage, this protector helps maintain thread integrity and fitment over time.