Product Description
Here is one of our favorite custom builds. We decided to try and rebuild the old school USAF 604. These are using a true 20" .625 pencil barrel with a 1/12 twist. The barrel is made of 41V50 steel and the chamber/bore is chrome lined. We have also used a A1 Bird cage flash hider on it. Upper receiver is black finished. Handguards are our new production. BCG and Charging handle are included.
Take a look at this great article about our upper http://www.gunsandgunsmiths.com/retro-ar-project/
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Great reproduction!
Completed a 604 build w/ this upper and an Unbranded retro AR lower. The upper came complete as pictured with the selected BCG, muzzle device, and charging handle. Finish is a black matte look, not too glossy, and matches very well with the CMMG A1 stock and Luth-AR A1 grip. No issues test firing and obtained a quick zero. The folks at the range qualified in the USAF with Colt 604 M16s, so they were very nostalgic when they saw me pull it out of the bag. Will definitely do business with TNTE again when I want a new retro upper!
