The LWRC SIX8-PSD 6.8 SPC 8.5" 1:10" 5/8x24 Bbl FDE Complete Upper Receiver finish enhances its tactical look and provides excellent corrosion resistance. This upper receiver is equipped with a short-stroke gas piston system that reduces recoil and enhances reliability. Fully ambidextrous controls and a modular rail system offer customization and comfort, making the SIX8-PSD a versatile and dependable choice for shooters seeking high performance in confined spaces. LWRC SIX8-PSD 6.8 SPC 8.5" 1:10" 5/8x24 Bbl FDE Complete Upper Receiver SIX8PSDUCK8