OK, again , the OAL length of a folding stock rifle is measured from the muzzle to the butt,in the extended position.
The USC definition of a rifle includes the term 'intended to be fired from the shoulder' , hence the OAL is measured from the muzzle to the end of the stock,WITH the stock extended.
For illustration, a Norinco Type 56s folding stock rifle measures 25 3/4 " in length WITH THE STOCK FOLDED. If the OAL length were measured with the stock folded, this rifle would be illegal, and I can assure you the Anti's would have prosecuted anyone who owned one.
The Type 56s folding stock rifle I-S legal , was ATF approved for importation , and was legally sold as a Title 1 firearm.
THE OAL LENGTH OF A FOLDING STOCK RIFLE IS MEASURED WITH THE STOCK IN THE OPEN POSITION.
*note* - I am addressing folding stock rifles not rifles with the stock welded closed.