YHM Diamond series free float rail, carbine length (just over 7 inches), great shape, comes with barrel nut. $85 SOLD YHM gas block height front flip up BUIS, great shape. $60 DPMS railed gas block .750 $25 Also have a delta ring assembly complete $10, back plate $3, trigger guard $3, grip $3 Looking for....... 16" or 14.5" gov. profile barrel Troy front folding battle sight M4 style Tango Down vert grip stubby in Foliage Green FDE Magpul furniture or accessories optics? Or??