HomeGun PartsAR15 PartsAR15 UppersHK UPPER MR556A4 5.56 16.5″ BLKHK UPPER MR556A4 5.56 16.5″ BLK$2,179.00 HK UPPER MR556A4 5.56 16.5″ BLK 29 in stock HK UPPER MR556A4 5.56 16.5" BLK quantity Buy now Add to WishlistRemove from Wishlist Add to Wishlist SKU: RSR|HK51000384 Category: AR15 Uppers Product ID: 96202 Related products Out of stock Add to WishlistRemove from Wishlist Add to Wishlist AERO M4E1 ASSEMBLED UPPER ODG $159.99 Read more Out of stock Add to WishlistRemove from Wishlist Add to Wishlist NORDIC NC15 EXTRUDED UPPER RCVR BLK $89.95 Read more Add to WishlistRemove from Wishlist Add to Wishlist LUTH AR A3 UPPER RECEIVER $110.87 Buy now
