Editing Submachine gun (section)

===1990s===
[[File:HKUMP45.JPG|thumb|right|A Heckler & Koch UMP45 with a vertical foregrip]]
In 1999, H&K introduced the [[Heckler & Koch UMP|UMP "Universal Machine Pistol"]].<ref>{{cite web |url=http://www.heckler-koch.com/HKWebText/detailProd/1926/82/4/20 |title=Heckler & Koch – Group Website |publisher=Heckler-koch.com |access-date=2009-06-26 |archive-date=2009-05-27 |archive-url=https://web.archive.org/web/20090527112537/http://www.heckler-koch.com/HKWebText/detailProd/1926/82/4/20 |url-status=dead }}</ref> The UMP is a 9mm Parabellum, .40 S&W, or .45 ACP, closed-bolt blowback-operated SMG, based on the [[H&K G36]] assault rifle.<ref name="Cutshaw2011">{{cite book|last=Cutshaw|first=Charles Q|title=Tactical Small Arms of the 21st Century: A Complete Guide to Small Arms From Around the World|url=https://books.google.com/books?id=55szjc6g520C&pg=PA156|year=2011|publisher=Gun Digest Books|location=Iola, Wisconsin|isbn=978-1-4402-2709-7|page=156}}</ref><ref name="Jane's Guns Recognition Guide 2005. page 192">Jane's Guns Recognition Guide. by Ian Hogg & Terry Gander. HarperCollins Publishers. 2005. page 192</ref> It features a predominantly [[polymer]] construction and was designed to be a more cost effective, lighter weight, and less complex design alternative to the MP5.<ref name="Cutshaw2011"/><ref name="Dockery2007">{{cite book|last=Dockery|first=Kevin |author-link=Kevin Dockery (author)|title=Future Weapons|url=https://books.google.com/books?id=_BJgKhwD2o4C&pg=PT383|year=2007|publisher=Penguin Group US|location=New York|isbn=978-1-101-20618-8|pages=383–385}}</ref> The UMP has a side-folding stock and is available with four different trigger group configurations.<ref>{{cite book|author=Andrius Genys|title=Submachine Guns and Assault Rifles|website=Military-Today.com|url=https://books.google.com/books?id=4W-iAgAAQBAJ&pg=PT2|year=2010|publisher=Andrius Genys|page=2}}</ref> It was also designed to use a wide range of [[Picatinny rail]] mounted accessories <ref name="Cutshaw2011"/><ref name="Jane's Guns Recognition Guide 2005. page 192"/>