to accept the new made uppers for different calibers?
Made a new upper with a .450 Bushmaster, for Zone 3 in Michigan.
would like to swap the 5.56 barrel onto a new upper from the HBAR [large hole] to the .25 hole.
Thanks.
to accept the new made uppers for different calibers?
Made a new upper with a .450 Bushmaster, for Zone 3 in Michigan.
would like to swap the 5.56 barrel onto a new upper from the HBAR [large hole] to the .25 hole.
Thanks.