Tac 9s are factory threaded for 5/8×24 TPI. Most prefer 1/2×28 to mate with standard chime accessories. If you would rather have this with your Tac9 please add this to the cart with your hardware purchase.
If you have already purchased a Tac 9 kit, you will be required to purchase a shipping label to send the parts to us. You can remove the barrel and send it by itself or send us the entire upper tube. Please include a copy of both your hardware purchase and re-threading service.