Here is the law on transport.
Breaking it down to plain English LTC-A you can have a loaded handgun if under your direct control, concealed.
If not under your direct control, unloaded and contained within the locked trunk of such vehicle or in a locked case or other secure container. Since a pick up has no trunk a locked case is ok. and behind the seat ever better.
Also if you have a car with a trunk and you want to transport long guns all they need to be is unload in the trunk. Not even in a case. It wouldn't be smart but if you read 131c (b) and (c) that would be legal. Aren't MA laws clear as mud!!
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PART I. ADMINISTRATION OF THE GOVERNMENT
TITLE XX. PUBLIC SAFETY AND GOOD ORDER
CHAPTER 140. LICENSES
EMPLOYMENT AGENCIES
SALE OF FIREARMS
Chapter 140: Section 131C. Carrying of firearms in a vehicle
Section 131C. (a) No person carrying a loaded firearm under a Class A license issued under section 131 or 131F shall carry the same in a vehicle unless such firearm while carried therein is under the direct control of such person. Whoever violates the provisions of this subsection shall be punished by a fine of $500.
(b) No person carrying a firearm under a Class B license issued under section 131 or 131F shall possess the same in a vehicle unless such weapon is unloaded and contained within the locked trunk of such vehicle or in a locked case or other secure container. Whoever violates the provisions of this subsection shall be punished by a fine of $500.
(c) No person possessing a large capacity rifle or shotgun under a Class A or Class B license issued under section 131 or 131F shall possess the same in a vehicle unless such weapon is unloaded and contained within the locked trunk of such vehicle or in a locked case or other secure container. Whoever violates the provisions of this subsection shall be punished by a fine of not less than $500 nor more than $5,000.
(d) The provisions of this section shall not apply to (i) any officer, agent or employee of the commonwealth or any state or the United States; (ii) any member of the military or other service of any state or of the United States; (iii) any duly authorized law enforcement officer, agent or employee of any municipality of the commonwealth; provided, however, that any such person described in clauses (i) to (iii), inclusive, is authorized by a competent authority to carry or possess the weapon so carried or possessed and is acting within the scope of his duties.
(e) A conviction of a violation of this section shall be reported forthwith by the court or magistrate to the licensing authority who shall immediately revoke the card or license of the person so convicted. No new such card or license may be issued to any such person until one year after the date of revocation.
