New in wrap current production Colt M16A4 flat top upper receiver with RAS T numbered rail. This receiver is NOT marked M4 and does NOT have M4 feedramps. This receiver is made for use with 20inch or longer rifle barrels or carbine barrels without the M4 barrel extension. I am asking $260.00 plus shipping and will e-mail additional pics to a serious buyer. Please contact me via e-mail through the site or direct at CLM4@EV1.NET. I accept bank or Postal money orders only.