H&K has unveiled a new upgrade package for the MP5 to modernize and improve the weapon, and was showing it off at the Association of the United States Army’s 2015 annual meeting. SoldierSystems.net reports:

This is the MP-5 Mid-Life Improvement. While they haven’t changed the weapon mechanically, they’ve upgraded to a new three position collapsible stock, the Modular Slim Line Handguard and Mounting Rail with STANAG 4694 Profile. All three of these items can be retrofitted to existing MP-5s.

The H&K MP5 has not only proven to be one of the most popular post-war submachine guns, but also perhaps the most enduring. Unlike its roller-retarded blowback stablemates, the MP5 has remained in H&K’s catalog, and the company still receives significant orders for the weapon, which is now over half a century old.