Home » Shop » Universal Advanced Hop-up Chamber & Inner Barrel O-Ring “TOP NEW M4A1 CARBINE (Shell Ejecting + Electric Blowback AEG)” has been added to your basket. View basket Universal Advanced Hop-up Chamber & Inner Barrel O-Ring$9.99 Universal Advanced Hop-up Chamber & Inner Barrel O-Ring quantity Buy now Add to WishlistRemove from Wishlist Add to Wishlist SKU: ibR-M4-BLU Category: Uncategorized Product ID: 48611 Additional information Additional information Weight 40 g Related products Add to WishlistRemove from Wishlist Add to Wishlist Tokyo Marui M9 $135.00 Buy now Add to WishlistRemove from Wishlist Add to Wishlist BOL 7.4V 1100mAh 15C Li-Po Battery (2 cells Pack) $25.00 Buy now Add to WishlistRemove from Wishlist Add to Wishlist TOP NEW M4A1 CARBINE (Shell Ejecting + Electric Blowback AEG) $545.00 Buy now