I just picked up some parts that were on sale and was able to use the free shipping code.
Midway USA promo codes
Free shipping over $99: SHIPSFREEMAR0218
https://www.midwayusa.com/promo/free-shipping-march02-18
$10 off non-sale items: 605BCD9
https://www.midwayusa.com/promo/18-01-01-18
Midway USA promo codes
Free shipping over $99: SHIPSFREEMAR0218
https://www.midwayusa.com/promo/free-shipping-march02-18
$10 off non-sale items: 605BCD9
https://www.midwayusa.com/promo/18-01-01-18