Ammunition sales​ to Massachusetts residents only with LTC or FID AND must transfer through a
Massachusetts-licensed ammunition seller who will agree to transfer first. >>> budsgunshop.com/feeds/state_reg/massachusetts_restrictions.pdf

Yea, I'd contact buds customer service at 859-368-0371 Monday thru Friday 9am to 9pm. Cause I'm reading it is legal to ship directly to your residence but alot of dealers won't and require you to go threw an FFL. Buds customer service will be able to give a definite answer, hope this helps.

Jonathan, you can see Buds policy under Accessories/Ammunition here (budsgunshop.com/feeds/state_reg/massachusetts_restrictions.pdf). I would ask Buds Customer Service if this is current or outdated information (Since other vendors ship ammunition to your residence) at 1-859-368-0371 9am-9pm EST Mon-Fri. or use the Blue Chat now button at the bottom right corner 9am to 9pm Mon - Sat and 9am to 7pm Sunday.