Thinking .223, as its accurate, reasonable inexpensive, but mostly just because its very common.

Looking to build a hybrid of sorts, mixing ak47/74 parts, to 1:9 twist .223 barrel. Normal AR-15 mags, and HK sights, or maybe galil. Probably utilizing AK underfolder stock.

Very similar to a galil, but without all the galil specific parts. Machining req'd is not an issue.


Lately, Ive been wondering if Im over thinking and should just do 5.45 instead? Not crazy common, but being a newwer caliber, maybe we'll see more surplus of 5.45 in later years, less 7.62x39, and maybe 5.45 stays less expensive than .223, causing it to become more common? There I go over thinking again! Thoughts?