This is a Spike's Tactical Stripped Lower Receiver known as the 9mm Colt Style w/Spider Logo chambered in 9MM, model STLS910.
Spike's lowers are made to the highest standards. If you are planning a build or just putting lowers away for a rainy day" you can't go wrong with Spike's lower receivers.
Features:
9mm
Hard Coat Anodized Finish
Lower Receiver