lazi, the block has me wondering too especially with the current political climate. I am sure if Colt won't release the block someone will manufacture one. The MSRP for a 6920 upper, adapter, buffer and spring is supposed to be at 675. Hopefully that price is right considering the buffer and upper.

As to the 7.62x39mm bolt rifle, Wolff spring would help the light strikes or reload and use commercial primers since they are softer.

Men you can't trust, women you can't trust, beasts you can't trust, but Bussekin steel you can trust