Details: The sale, offering for sale, transfer or possession of large capacity feeding devices for assault weapons, is prohibited unless such device was lawfully possessed on September 13, 1994. Under Massachusetts law, a "large capacity feeding device" is defined as: "(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." Ch. 140, § 121. This does not include "an attached tubular device designed to accept, and capable of operating only with, .22 caliber ammunition."