Centerfire Systems - Free Shipping on internet orders over $50
This one says "site wide" so it should include anything online.
Also, there is a bunch of 1911 handguns that are marked for free shipping before this deal and possibly well after it.
Check it out, possible nice deals for ammo and firearms.
(note. they claim to charge 3% up on credit card payments. Personally they've never upped my charges when I use my CC)