I have a Benelli 1014 (the one with the flag, and non-collapsible stock that in appearance only looks like the collapsible stock). Can this 1014 be converted to have the multi-position collapsible stock (like the older M4s that look the same)? A few years ago, the local Benelli dealer, from whom I purchased this 1014, advised me that the only way possible to make this 1014 into the multi-position collapsible stock, was to machine that gray rod-spring. But now, it looks like I may be able to just purchase a shoulder piece (or am I mistaken here, and can not make this conversion without any machining).