Selling my surplus Colt M4A1 Block II upper receiver group I purchased last summer from Wet Worx. Upper is rattle canned and will ship WITHOUT a BCG, CH, or muzzle device. Has a Colt govt profile barrel, colt gas tube, contract low profile gas block. Plenty of strong rifling in the barrel.

If this ad is still up, it’s available! Send offers. Will also trade for a tan EXPS3-0.