I not only recommend this chasis… i also reccomend optics planet!!! - FAB Defense M4 SKS SB Complete Chassis System, w/ Shock Absorbing M4 Tube & Buttstock

Initially received a UAS unit and the dust cap was missing 2 little springs on the back of the dust cap. I couldn’t figure out why it would move freely... I contacted Fab and they said to bring it to a smith, who of course said there was something missing! I re- ordered this one instead with the Proprietary recoil softener. This thing is SICK! Shoots like a charm and Optics planet took care of the full refund and return shipping on unit missing springs! Fab and OP seem to work together so if you’re considering buying this item Optics Planet DO IT !