Keep in mind AK-74 ammo is corrosive and US built 74’s do not have chrome lining so it seems like a waste of money.
Cleaning up after shooting corrosive ammo is really no big deal, especially with an AK. Simply field strip, spray soapy water down the barrel, swab or follow up with WD-40, wipe out the chamber and wipe off the bolt with a soapy rag, rinse with WD-40, and clean as normal when you get home.
Saigas have chrome-lined bores and are easy to convert to AK-74 format, and many builders use chrome-lined bores in their new AK-74 builds.
At a dime a round, it's hard to beat 5.45x39. Buy it cheap, stack it deep. :)