Adcor AR-15 D.I. Bolt Carrier with Dust Wiper

The Adcor AR-15 Bolt Carrier with Dust Wiper has a spring-loaded dust wiper mounted on the bolt carrier. The polymer Dust-Wiper has constant positive pressure against the inner wall of the upper receiver. This keeps the ejection port sealed at all times while the bolt is in battery. Upon firing, the bolt carrier returns to the ready position. The dust wiper moves into the ejection port opening flush with the inside geometry of the upper receiver, preventing entry of dust, sand, or debris. The highly durable, self-lubricating polymer wiper withstands extreme temperature and impact. The action of the bolt and exhaust of the round blasting out of the ejection port clears any dust or debris as the BC slides back the polymer dust-wiper is scraping against the edge of the ejection port opening allowing the exhaust blast to bow it out and away. No matter the weather or area condition you shoot at, the ADCOR BC w/ Polymer Dust-wiper will protect the action area of your AR rifle.