Here is one of our favorite custom builds. We decided to try and rebuild the old school C7 M-16A1 Carbine These are using a true M-4 carbine barrel with a 1/7 twist. The barrel is made of 41V50 steel and the chamber/bore is nitride coated. We use a Extended A2 Bird cage flash hider on it then pin and weld to complete compliance with the 16" OAL length rule. By doing so this is not a NFA/SBR item. C7 Upper receiver is black finished. Handguards are single wall Mil-Spec.
The 80's and 90's saw major changes to the modern duty rifles carried by US forces. Most notable the adoption of the carbine gas system and shorter barrel over the longer rifles. These advancements where directly related to the requests from special forces units such as SOF-D, Army Rangers, and Navy SEALs. The 723 and 727 were the precursor to the modern M4 we all know today.
Upper: TNTE 7075-T6 C7 with Black Type III hard coat with M4 ramps
Barrel: TNTE 14.5" 5.56 1/7 QPQ barrel with 1/2x28 thread
Gas System: Carbine
Gas Block: Pinned on standard height A2 FSB
Handguard: Two Piece Carbine
Flash Hider: Extended A2
Charging Handle: Optional
Take a look at this great article about our upper http://www.gunsandgunsmiths.com/retro-ar-project/
3 Reviews Hide Reviews Show Reviews
Threw this with a frt15 lower and it shoots simulated full auto like a champ. Solid construction with nice chrome lined bore.
TNT did an Excellent job. This help create an Excellent one of the 723 used by Delta SFOD-D during Operation Acid Gambit/ Just Cause. I'd highly recommend this product.
Received mine after 2 months. Very happy with this upper. Craftsmanship is on point and performa very well! Perfect fit for my Aimpoint 3000. Would very much recommend.