The JE Machine Tech PS-DC4B is a lightweight dust cover (ejection port cover) for the AR-15, listed with a QD design. It closes the ejection port to keep dirt and debris out of the upper receiver. It is a simple swap-in upgrade for a standard port cover.
- Brand: JE Machine Tech
- Fits: AR-15
- Type: lightweight dust cover (QD)
- Manufacturer part #: PS-DC4B
- UPC: 811577035834
