PWS (Primary Weapons Systems) MK111 MOD 2-M in 223 Wylde (will also shoot .223 and .556) AR-15 Adjustable Piston Complete Upper. This is in near new condition. I am the original owner and fired very little. It is MOA accurate (with 77gr OTM) and completely reliable. NOTE: This has the SureFire SOCOM Closed Tine Flash Hider installed (with Rockset) for use with all SureFire Socom Suppressors and Wardens. I am downsizing my collection. The 3-position adjustable gas piston makes it perfect for suppressing. $950 Cash. Buyer must be at least 21 years of age. Please call or text David at 208.786.2005. I live in Boise.