Protects your threads from damage if you decide to remove your suppressor or other muzzle device.

Barrel Thread Item Number
½ – 28 THP – 0528
.578” – 28 THP-5728
5/8 – 24 THP-6224
M16 x 1.0 THP-M1610
M16 x 10 Left Hand THP-M1610-L