Home / AR15 UPPER RECEIVERS / NEW FRONTIER C4 UPPER RECEIVER AR15 SIDE CHARGING BILLET BLK NEW FRONTIER C4 UPPER RECEIVER AR15 SIDE CHARGING BILLET BLK Manufacturer : New Frontier Armory UPC : SKU: d41d8cd98f00 Category: AR15 UPPER RECEIVERS Product ID: 145816 Related products Out of stock BATTLE ARMS AR15 LIGHTWEIGHT UPPER RECEIVER BILLET BLACK $25995 Out of stock ANGSTADT UPPER RECEIVER PISTOL 9MM 6″ M-LOK BLACK BCM UPPER RECEIVER ASSEMBLY MK2 AR15 BCG NOT INCLUDED $16500 NEW FRONTIER C4 UPPER RECEIVER AR15 SIDE CHARGING BILLET BLK $22499