This is a P-Rail version of the MP5K PDW stock this fits the new MOD22x new Prail endcap and is compatible with most Prail stock adaptors out there, this is a very lightweight and comfortable design, more stocks coming very soon ;) ###As usual all building details will be in the make. If you are interested in other firearm parts and designs do join our group on keybase: Gun_Cad_Ideas the coolest prop team ever !!!Note: I'm always open for suggestion and help on improving the design and proof of concept. !Don't forget to check out my other Cool designs and Follow my Weekly dose of KooKoo uploads