HECKLER AND KOCH MP5 .22 LR Rifle is now available at Atlantic Firearms! The Heckler & Koch MP5.22 LR rifle is a reliable and durable sporting carbine based off the MP5 platform. The MP5 is a timeless classic that has proven its worth in military special forces and SWAT teams. The MP5's design and ergonomics are similar to the MP5's, with a 16-inch barrel and a padded mag release. There are also precision-machined components, such as a precision-machined mag release and other features. Take a look at the vieo below as Matt walks us through the features of the HECKLER AND KOCH MP5 .22 LR Rifle