Zenith ZF-56 / ZF-300 Compatible Accessories

Zenith's ZF-series brings the roller-delayed MP5 pattern to a US-made receiver, and A3's HDA3 line fits it directly: hybrid polymer stocks and braces, the HDA3 adapter, a 1913 Picatinny adapter, and a folding G3-style walnut stock from JMK Customs.

Products are cataloged for the ZF-56 and ZF-300 (and the ZF-39 where noted). The firearm-adapter variant on modular products locks the Zenith interface at checkout so the correct hardware ships in the box.