Magpul Industries SL Stock, Fits HK HK94/MP5, Matte Finish, Black MAG1250-BLK The Magpul SL Stock - HK94/MP5 delivers the modern qualities found in Magpul's original MOE SL Carbine Stock for AR15/M4 carbines to MP5 pattern rifles. Durable" lightweight" and collapsible" the SL incorporates Magpul design and engineering to provide a robust feature set" all while maintaining the iconic aesthetic of the platform.