Type 81 Muzzle brake thread adapter for LMG, converts to 5/8-24
Thread adapter to Convert M16x1 RH to 5/8" - 24 Male, Steel, Black
$50 for the adapter
$18.50 for shipping nationwide, includes, insurance and tracking.
Please take a look at my other ads I do lots of handy 3D printing, I also do custom printing and designs.
shipping or local, I can do both not a problem just send postal code for a shipping quote