BudsGunShop.com - Heavy Barrel

John F - this is listed as having a 'heavy barrel' and the barrel does not have 'cuts' in it, which is prohibited in MD. HOWEVER - this has 30 round capacity, which is MD prohibited, to my understanding. You can read the MD restrictions here: budsgunshop.com/catalog/feeds/state_reg/maryland_restrictions.pdf

The barrel should be compliant with Maryland law. The magazine however isn't.

John, you don't necessarily need a "Heavy Barrel", just one hat has no cutouts like the M4 Barrel. The top two are fine and the bottom two are a no go here : google.com/search?q=m4+barrel+vs+hbar&source=lnms&tbm=isch&sa=X&ved=0ahUKEwibrrbp0-ngAhUQj1kKHRojCq8Q_AUIDigB&biw=1920&bih=938#imgrc=8vxeWa-GSvVI1M: