Upper And Lower Receivers

Barrel: 14.5" 5.56 Caliber 1/8 Twist 4150 CMV Heavy Profile with M4 Feed Ramp. Chrome Lined.Gas System: Direct Impingement, Carbine LengthUpper Receiver: A3 Mil-Spec 7075-T6 Aluminum with Mil-Spec Hard Anodized Finish.Charging Handle: Standard Charging...

**PLEASE NOTE: This item MUST be shipped to Licensed Firearms Dealer.  We will contact you for a copy of the FFL that you would like to use.**Made from 7075T6 aluminum forgingsOur lowers are made in house on our state of the art machinesMade to...

The Standard Manufacturing Co. STD-15 upper receiver, like the STD-15 lower receiver, is entirely manufactured in-house to the most exacting tolerances and to the highest quality control levels. The STD-15 upper begins with a 7075T6 aluminum forging and...

The Standard Manufacturing Co. STD15 upper receiver is completely manufactured in-house alongside the STD15 Lower receivers.   As with the STD15 lower receivers, the STD15 uppers are constructed to the most exacting...

The Standard Manufacturing Co. STD-15 lower receiver is completely manufactured in-house to the most exacting tolerances and to the highest quality control levels.  The STD-15 lower begins with a 7075T6 aluminum forging...