Just released a shipload of muzzle bits in various configurations. Click the links to see the full descriptions with length (many are in 5/8" or 3/4" lengths) and diameter specs.
DRP Muzzle Thread Adapter
Muzzle Thread Adapter (Stainless)
Shoulderless Muzzle Adapter (1/2"-28 to 5/8"-24)
Jam Nut for Muzzle Devices, Round (DRP)
DRP Jam Nut for Muzzle Devices, Round, Stainless
Grooved Muzzle Thread Protector (1/2"-28)
Smooth Muzzle Thread Protector
Smooth Muzzle Thread Protector (Stainless)
Knurled Muzzle Thread Protector
Knurled Muzzle Thread Protector (Stainless)
Smooth Muzzle Thread Protector w/Flats
Smooth Muzzle Thread Protector (Stainless w/Flats)
TNA Muzzle Thread Adapter
TNA Muzzle Thread Adapter for Metric Barrels
Jam Nut for Muzzle Device, Hex