Use extra collars to allow the use of one BMD® across multiple firearms.
A2 Adapter Collars work ONLY with the following LANTAC Dragon® Muzzle Brakes:
 
DGN556B (5.56/223)
DGN9MMB (9mm 1/2x36)
DGN9MMC (9mm MPX)
DGN9MMD (9mm 1/2x28)
DGNAK47B (AK47)
Comes with appropriate crush washers.
Collars are to be used in combination with the BMD®.
Made in the USA.