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 19 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 AR15 ASSEMBLED UPPER FDE $144.99 Read more Add to WishlistRemove from Wishlist Add to Wishlist BALLISTIC BA AR 15 UPPR RCVR $124.99 Buy now Out of stock Add to WishlistRemove from Wishlist Add to Wishlist AERO AR15 STRIPPED UPPER FDE $119.99 Read more
