My guess would be the woodwork isn't factory. No real good view of the triggerguard but it doesn't look long enuf to be off a 280 so maybe it's just the original from a pistol grip straitened. Does the inletting around the top tang look good enuf that they'd want to machine them like that all day long day in and day out. Checkering with the extra 2 line arrowhead looks a bit "individualistic" to me but doesn't look tentative or amateurish otherwise so, on balance, even if it's aftermarket, it's fairly attractive and not much apparent connection to the Anonymous Yahoo style of doing things.
I've got a 20 with a strait stock and probably a t-guard off a 280e and the longest forend (18") with a brazed on pushrod extension you'll ever see. The wood is a quilted black walnut uncheckered, so that along with the goofy forend and brazing tells me mine is absolutely a home do. Mine is not case colored but the black chrome version.
jack
