Re: Irong sights
Look up 'Oldeyes" on this site (User List, above), also check out Champion's Choice.
The value and cost inherent in acquiring real competition micrometer sights, etc. is in the precision and reliability. I would think long and hard about that cost when contemplating buying something as a stopgap to serve until glass is available.
If you're going to buy an interim sighting system, and unless you're seriously planning a significant foray into Palma, etc., applications that are exclusively the domain of the Iron Sight Heroes (no disrespect intended, rather; it's a term of utmost respect on my part), then I suggest it's maybe better to compromise and buy an optical sight system that will serve, albeit with less 'gravitas' than the quality scope.
You can get right into the fray, and when you get the necessary buckage to upgrade, the more plebian scope can still serve adequately on a rimfire trainer, which is another absolutely necessary complement to the precison shooting ensemble, IMHO.
I own 4 of the Tasco VAR624X42M Varmint/Target Scopes. All the requisite features in a lower grade, lower cost package. Mine ran $79.00 apiece, and they do the job in a satisfactory manner. I tend to tempt the Devil and use them in applications that make me put a lot of faith in a modest implement, but so far, I like them (after going on 6 years).
Greg