The UPC crosses to a 5.56 receiver (will work with 5.56 and .223 ) "DPMS AR-15 Partially Complete Lower Receiver, 5.56 NATO, Black Brand: DPMS
UPC: 884451000570
MFR #: 60596 Looking at building a new AR-15? The choice between a pistol or rifle can be a hard one, that is why DPMS offers their excellent AR-15 lower receiver without a stock. When you buy the partially complete lower receiver from DPMS, just pick what type of receiver extension you need to complete your build, and you are in the home stretch! Made on state of the art CNC machines from a high quality 7075 T6 aluminum forging DPMS delivers a product that exceeds all of your expectations.
The black Teflon finish applied over a Mil-Spec hard coating does an excellent job of keeping carbon from sticking to the surface of the receiver to make cleaning easy. With the partially complete AR-15 lower receiver, getting your next project started on the right foot has never been easier!
Specifications and Features:
DPMS stripped AR-15 lower receiver LR-05K
Forged from 7075-T6 aircraft aluminum
Hardcoat anodized per Mil-A-8625
Teflon coated Black

Guillermo, this Multi-Caliber Receiver will work with many calibers such as 5.56, .223, 300Blk. 300 Whisper, 7.62x39, 6.5 Grendel, 6.8 Remington SPC, 5.7x28mm, 458 SOCOM etc.