For sale is a very good condition FN marked M16Rifle MK12MOD0 chambered in 223 Wylde/5.56mm.  This semi auto rifle has an Xcaliber custom 18 inch barrel chambered in 223 Wylde with a 1:7 twist marked MK12 1:7 TWIST 223 WYDLE.  It has a silencerco ASR closed tine flash hider and a PRI handguard with complete rail setup.  The folding sights are PRI both front and rear.  It is setup with a fixed A2 stock.