Here I have my like new PSA mk18 in 556. Barrel is 10.5". This pistol has a KAK 4 prong flash hider, magpul trigger guard, magpul k2 pistol grip, magpul buffer tube qd sling plate, magpul brace, and a ris qd rail attachment that is not pictured but included. The rail is metal and the fitment of the metal receivers is really good. Please let me know if you have any questions. Thank you!