Pierre, you have quite a few good options. The main restrictions in Maryland is it can't have more than 10 rounds and has to have a heavy barrel. If interested here's a link to one I'd recommend..................... budsgunshop.com/product_info.php/products_id/415001946/windham+weaponry+-+ww+rifle+a3+223+16+t-6stk+hb+10rd+medium ....................... Or if interested here's a link to one made by Ruger..................... budsgunshop.com/product_info.php/products_id/34869/ruger+ar+.223+remington+5.56+nato+16in+10rd ...................... If you find one with a heavy barrel but has a 30 round magazine buds will remove the magazine but won't replace it. During checkout there will be an option to remove the magazine. Then you would just have to purchase a state compliant 10 round magazine separately. If you post again with your budget and what type your looking for can help find you something more specific. Lastly here's a link to Maryland's restrictions if interested.................... budsgunshop.com/feeds/state_reg/maryland_restrictions.pdf .................. Hope this helps.

Pierre, too many to list here, you can check if the gun you want is compliant here >>> https://mdsp.maryland.gov/Organization/Pages/CriminalInvestigationBureau/LicensingDivision/Firearms/FirearmSearch.aspx?Paged=TRUE&p_GroupCol1=MISC&PageFirstRow=101&&View={5E568F20-A495-4E49-A0E0-C53F530B98F7}

Also the Windham Weaponry R16A4T (Buds will remove the 30rd Magazine) : budsgunshop.com/product_info.php/products_id/77543/windham+weaponry+r16a4t+m4+a3+223+16+hb+flat+30r ------------------- The list of MD compliant AR's can be seen here : blackanchorarmory.com/md-legal-ars.html

Hi Pierre, the Ruger Model 8502 and 8511 : budsgunshop.com/product_info.php/products_id/347/ruger+ar556+223+16+fxd+10rnotca ------------------- budsgunshop.com/product_info.php/products_id/34869/ruger+ar+.223+remington+5.56+nato+16in+10rd --------- Cheers and stay safe!