they wouldn't, can give you my guarantee they would paint the rail. Otherwise it wouldn't be 51% which could get them a hefty fine and into trouble. Its better just to get the carbine. £120. you have 30 quid to spend, they paint the front end, replace for 10 quid, stock (stubbies aren't adjustable, and nunchucks aren't really that hard to use at all really, just means they don't fall around as much imo) cost £15, plus say tenner for the sight (they don't paint pistol grip, they paint rear sight for carbine at least) and you have spent £165, manufactured an RIF, broken the law and have a black gun...