Spike's Tactical lower is American-made to the highest standards. Forged from 7075 T6 aluminum, it supports a black hard-coat anodized finish, multi-caliber, low shelf, and is RDIAS compatible. This model has an ST Spider logo with red coloring. NOTE: Requires a lower parts kit, buffer & stock of your choosing to complete.
| Manufacturer | Spike's Tactical |
| Model | SPIDER ST15 |
| Caliber | Multi |
| Type | Receiver |
| Action | Semi-Auto |
| Color | Black |
| Size/Length | Black Hardcoat Anodized |