Gary, yes should be MD complaint, it is equipped with a heavy-contour, cold hammer-forged 4140 chrome-moly steel barrel. >>> ruger.com/products/ar556/specSheets/8530.html ... I would double check with your FFL, as the MD gun roster does not say one way or the other about this model, but other models on the roster with heavy barrels are compliant. >>> https://mdsp.maryland.gov/Organization/Pages/CriminalInvestigationBureau/LicensingDivision/Firearms/FirearmSearch.aspx?Paged=TRUE&p_GroupCol1=Mossberg&PageFirstRow=101&&View={5E568F20-A495-4E49-A0E0-C53F530B98F7} .....Have a great day!

Unfortunately no, this is not Maryland compliant. AR rifle must possess a heavy-barrel contour to be Maryland compliant. This rifle does not have a heavy-barrel contour. ( budsgunshop.com/feeds/state_reg/maryland_restrictions.pdf ) I hope this helps!

Gary, no Sir it is not MD compliant (Needs a Heavy Profile Barrel). Some good MD details here : blackanchorarmory.com/md-compliant-ars.html