SB Tactical SBT5-01-SB is a complete side-folding assembly for compatible MP5 and MP5K Reverse Stretch platforms. Its integral mechanism folds laterally to provide a compact profile for storage and transport.Molded polymer construction incorporates an end cap and QD sling socket. Compatible models include HK SP5, Century Arms AP5, Zenith ZF-5, PTR 9CT, and most MP5 9mm clones; verify fit before installation.Fits HK SP5, Century Arms AP5, Zenith ZF-5, PTR 9CT, and most MP5 9mm clonesMolded polymer end cap with QD socketIntegral side-folding mechanismComplete assembly, ready to installA practical, compact upgrade for compatible MP5 configurations.