I am sorry I don't know which of the DPMS uppers you are asking about The best way to ask a question is from the Item page just above the reviews there is a box "ask the community" click on it and it will fill out the data about that item in your question or you can just give us the buds item number so we can look it up. The barrel could be legal in NJ until you match it to a receiver (that would give you 2 or mor of the following here are the restrictions for guns in NJ The following are prohibited: Semi-automatic rifles that are capable of receiving a detachable magazine and has at least two of the following features: 1. Folding / telescoping stock 2. Pistol grip 3. Bayonet lug 4. Flash suppressor 5. Threaded barrel 6. Grenade launcher budsgunshop.com/catalog/feeds/state_reg/new_jersey_restrictions.pdf

Alphonse, this will depend on the "Lower" you plan to attach. If your lower is "Fixed Stock" w/detachable magazine without pistol grip then the "Upper can have one of these items only - 1. Bayonet lug 2. Flash suppressor 3. Threaded barrel 4. Grenade launcher (If your lower is "Fixed Stock" w/detachable magazine with pistol grip then the "Upper" is not legal in NJ).

No it isn't legal