TacFire MAR093 AR-15 Dust Cover - Black Steel Ejection Port Cover

The TacFire MAR093 Dust Cover provides reliable protection for AR-15 ejection ports against dirt, debris, and moisture infiltration. This black steel dust cover maintains proper function in harsh environments while offering quick deployment when needed.

What Makes This Different

Unlike polymer alternatives that can crack under extreme temperatures, this steel construction withstands impacts and temperature fluctuations from -40°F to 160°F. The precision-machined fit eliminates gaps that allow contaminants to enter the action. Spring tension provides positive closure while allowing instant opening during the firing cycle.

Key Features

• Heat-treated steel construction resists impact damage and temperature extremes
• Mil-spec dimensions ensure compatibility with all AR-15 and M4 upper receivers
• Corrosion-resistant black finish prevents rust and reduces glare
• Spring-loaded hinge mechanism provides reliable closure and quick deployment
• No-gunsmith installation using existing pivot pin and detent spring
• Laser-engraved markings maintain visibility through extended use
• Compatible with both commercial and military specification upper receivers

Field testing demonstrates consistent operation through 10,000+ round cycles without spring fatigue or hinge wear. The cover automatically opens during firing and closes when the bolt carrier group returns to battery. Law enforcement agencies report reliable function in sandy, muddy, and marine environments where debris infiltration causes malfunctions in unprotected actions.

Technical Specs

• Material: Heat-treated carbon steel
• Finish: Matte black oxide coating
• Weight: 0.8 ounces
• Dimensions: 1.75" x 0.75" x 0.25"
• Compatibility: AR-15, M4, and AR-10 platforms (5.56/.223 uppers)
• Installation: Drop-in replacement for standard dust covers
• Temperature rating: -40°F to 160°F operational range

Professional armorers choose the MAR093 for builds requiring maximum durability and environmental protection. The steel construction and precise tolerances ensure consistent ejection port sealing across temperature and humidity variations that affect polymer covers.