Here for your consideration is an all original Colt Model 639 the commercial version of the XM177E2 a hard to find variant of the full auto M16 family. The Military issued these iconic weapons to the MACVSOG special operation units in Vietnam in1967 and 1968. They feature a 11.5 inch barrel ,forward assist, two position aluminum collapsing stock. This model also came with a Colt manufactured Moderator which served to change the sound signature when fired . Because of this the BATF considers the moderator as a suppressor as such this gun will require two NFA transfer tax stamps. Both the gun and moderator will transfer on a form 4 in Pa. These do not come around very often they are scarce and very few where made by Colt for the commercial market. Condition: Overall appearance and finish is pristine. Bore and bolt are excellent . This is surely an investment level firearm of the very highest order, so don't miss your chance to own this historic weapon built by Colt in the very early days of the M16 . Buyer pays all shipping and Transfer fees……..Feel free to email me with any questions you may have ….Thank you and good luck