Ammotech (Valken) FSC/T8.1/T9.1 Muzzle Adapter MSRP Sale $74.95 The AMMOTECH FSC thread adapter allows you to convert the Ammotech FSC/T8.1/T9.1's front thread protector to a 7/8-20 external thread for better muzzle compatibility. Includes its own thread-on protector.Made by AMMOTECH in the UK. ... Qty in Cart: 0 Quantity ( in cart): Decrease Quantity: Increase Quantity: Price: MSRP Sale $74.95 Subtotal: Add to Cart