I have a Post 1994 Colt Match Target lower. As far as I know, these have a sear block.
You need a mil-spec hammer, to work with the HK, MR 556 upper.
Can I install a mil-spec hammer with this receiver ?
You need a mil-spec hammer, to work with the HK, MR 556 upper.
Can I install a mil-spec hammer with this receiver ?