The Sanders Armory AR15 BILLET AMBI AR-15 223/5.56 NATO/300 AAC/350 Legend Side Charge Upper Receiver is a custom receiver made from 7075 T6 Grade Billet Aluminum with Mil-A-8625 Type III Hard Coat Anodized Finish and M4 Feed Ramps. This side-charge upper receiver will fit and accept any AR15 Mil-Spec lower receiver and barrel. The Bolt Carrier Group (BCG) is a dedicated custom AMBI Side Charge AR15 Mil-Spec Nitride Bolt Carrier that permits a charging knob to be inserted on either the left or right side for ease of use.  The bolt carrier includes a Mil-Spec AR-15 223/5.56 NATO/300 AAC/350 Legend bolt head (.136). The Bolt is “true” Mil-Spec dimension, and external surfaces are CNC ground after heat treatment for a precision fit and made with case Hardened 9310 Steel with Phosphate per MIL-STD-171, Hardened 4340 cam pin, Mil-Spec firing pin made of 8740 steel, center-less ground and Hard Chrome coated, the Side-Charge Handles are fortified and made of 4140 Chrome Moly with a Nitride Finish. Made in the USA!

Sanders Armory 16” MATCH GRADE .350 Legend 416R Stainless Steel Barrel with a Tapered HBAR profile with 1:14 Twist Rate; this is a MEDIUM weight HBAR barrel.. Includes M4 Feed ramps, a Carbine Length Gas System, 750 Gas Block Acceptance and is AIR GAUGE Tested. The barrel is threaded for a Flash Hider or Muzzle break with 5/8 x 24 thread pitch. Weight: 1 Pound 13 ounces.

Sanders Armory is all about making life easy for you ... Take the frustration out of attaching your gas tube and gas block with our ALREADY Assembled Mid Length Gas Tube and a Low Profile .750 Steel Gas Block with a QPQ Nitride finish.

The 350 Legend DURAMAG SS™ is designed for serious shooters who require the most out of their magazines so when performance and durability are paramount, make the switch to DURAMAG SS™ and never look back.

Constructed from premium 410 Stainless Steel for maximum durability. This material, coupled with advanced interior and exterior geometries, ensure ultimate reliability and feeding. DURAMAG™ will not flex or swell like polymer and are safe for extended storage while loaded without any add ons. These magazines utilize our T-360™ coating to ensure not only incredibly smooth performance and ease of loading, but also product longevity through the harshest conditi