Shotguns:
(D) a
semiautomatic shotgun that
has at least 2 of--
(i) a folding or telescoping stock;
(ii) a pistol grip that protrudes conspicuously beneath the action of the weapon;
(iii) a fixed magazine capacity in excess of 5 rounds; and
(iv) an ability to accept a detachable magazine.'.
How the AWB applies to Magazines (eg, so called "Large Capacity Feeding Devices" under MGL):
The federal ban stipulated a ban on "Large Capacity Feeding Devices", and this is the MGL version:
“Large capacity feeding device”, (i) a fixed or detachable magazine, box, drum, feed strip or similar device capable of accepting, or that can be readily converted to accept, more than ten rounds of ammunition or more than five shotgun shells; or (ii) a large capacity ammunition feeding device as defined in the federal Public Safety and Recreational Firearms Use Protection Act, 18 U.S.C. section 921(a)(31) as appearing in such section on September 13, 1994. The term “large capacity feeding device” shall not include an attached tubular device designed to accept, and capable of operating only with,.22 caliber ammunition.
What this means in english is that within the borders of MA, you cannot legally own/possess a magazine that meets the description above (unless the magazine was made on or before 9/13/94). You're probably wondering what an attached tubular device is"- think feeding tube on a tube fed .22 LR rifle like a Marlin or some of the old Winchesters. This carve out was stuck in the law to keep the fudds from getting upset when it got passed.
[...]
Exemptions: (This is important!)
The MA AWB does not apply in the following scenarios:
-The device in question is possessed by an MA FFL or a LEO (for use in performance of their duties)