RADICAL FIREARMS 16" 556 SOCOM PROFILE WITH A 12" Radical Firearms exclusive 12" FGS Rail. Rail is light weight and is designed for accuracy and to keep your hands cool. Great deal at $195 TM or call. If these are not on my website or price is different please contact me. REDACTED Follow the below link

https://chuckstactical.com/shop?olsPage=products%2Frf-upper-16-5-dot-56-m4-profile-fgs-12-rf-round-rail

If you want to complete this upper $120. Nickel Boron BCG rated Full Auto and Mil-Spec Charging Handle. $90 for the same but with Melonite BCG rated full Auto