A direct thread adapter for the mounting of Gen 1 (non-HUB) Nosler suppressors onto firearms with 1/2-28 TPI muzzle threads. Gen 1 Nosler suppressors are designed to mount directly over the Nosler Muzzle brake using the integral left-handed threads at the rear of the suppressor body. This adapter takes the place of the muzzle brake and allows for mounting of the suppressor directly to the muzzle threads.Use this adapter with the following Nosler suppressor models: SR-22Ti SR-22ALTi SR-30K SR-30Ti SR-30ALTiNote: This adapter is not for use with H series HUB compatible suppressors.