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 9 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 LUTH AR A1 ASSEMBLED UPPER RECEIVER $187.95 Read more Out of stock Add to WishlistRemove from Wishlist Add to Wishlist BCM UPPER REC ASSEMBLY FT M4 $129.00 Read more Out of stock Add to WishlistRemove from Wishlist Add to Wishlist AERO EPC-9 ASSEMBLED UPPER FDE $184.99 Read more
