a short-barreled version which makes the weapon NFA-regulated as short barreled rifles, subject to ownership restrictions and transfer taxes. Owing to the short barrel, the D does not include the folding bipod, but otherwise contains the same features as the C model, including the folding buttstock. The D models also include a second bottom-mounted Picatinny rail. SU-16E The SU-16E model is a pistol grip version of the rifle, It has a 16-inch barrel, that is also threaded at the muzzle, and can be mounted with accessories. SU-16F The SU-16f model is a longer barreled version which cannot be fired when broken down. It has an 18.5 inch barrel, making it compliant with the Canadian Firearms Act, making it legal for sale in Canada as a non-restricted rifle. It includes the folding bipod/forend. References External links Kel-Tec's SU-16 homepage — Contains descriptions of each variant, plus downloadable manuals and parts lists Kel-tec Owner's Group (KTOG) https://web.archive.org/web/20070830075151/http://world.guns.ru/civil/civ002-e.htm 5.56×45mm NATO semi-automatic rifles Survival guns