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 SPIKE’S FLAT TOP UPPER 9MM BLK $103.50 Read more Add to WishlistRemove from Wishlist Add to Wishlist FORTIS BILLET UPPER RECEIVER $189.95 Buy now Out of stock Add to WishlistRemove from Wishlist Add to Wishlist AERO M5 AR10 ASSEMBLED UPPER KDK BRN $159.99 Read more
