Dust Cap Kit Black 2.5 GN with O-Ring & Screws

The Dust Cap Kit Black 2.5 GN with O-Ring & Screws is an essential protective component for tactical and military applications where gas-block connectors and port assemblies demand reliable sealing. Designed for operators in law enforcement, military, and civilian precision rifle platforms, this kit protects threaded gas-block ports from environmental contamination, debris, and carbon fouling during storage, transport, and deployment. Whether you're maintaining a duty rifle, a competition build, or inventory across an armory, proper dust-cap protection extends component life and ensures reliable performance when the firearm is called into action.

This kit features a precision-engineered black anodized dust cap sized for 2.5-inch gas-block apertures, integrated with an O-ring gasket for positive sealing against moisture and particulate infiltration. The included stainless-steel screws provide secure fastening without risk of corrosion or galling, critical for field-strippable assemblies that see repeated installation cycles. The O-ring composition resists petroleum-based solvents and lubricants commonly used in tactical maintenance protocols, ensuring the seal remains effective across extended storage periods and temperature fluctuations typical of operational environments.

Armorers, gunsmiths, and unit-level maintenance personnel will find this kit indispensable for inventory management and preventive maintenance. The compact design—measuring 3.95 by 6.2 inches—fits easily into maintenance kits, vehicle storage, or rack-mounted tool systems. Installation is straightforward: align the cap with the 2.5-inch threaded port, seat the O-ring, and tighten the supplied screws to finger-tight tension. Compatible with modern direct-impingement and short-stroke piston gas systems using standard 2.5 GN port dimensions, this dust cap kit is a low-cost, high-reliability investment for any serious rifle program.