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 and is machined on the very best aerospace machinery in the business. At every step of the manufacturing process each lower receiver is quality checked before continuing to the next operation. This cannot be said for the many less expensive lower receivers available that are mass-produced and built to a price-point. If your next AR build requires the very best, the STD-15 lower receiver is your only option.
7075T6 aluminum forgings
MILSPEC and patterned the interior to long trigger pocket and a low shelf.
This means if you own a RDIAS, there is no milling is required
Rich black Type 3 Hardcoat Anodized finish
MILSPEC small pin holes
Trigger and hammer pin size is .154”
Pivot and Takedown pin hole size is .250”
All STD15 lower receivers are marked MULTI CALIBER
MADE IN THE USA AT STANDARD MANUFACTURING CO LLC