![Atlas BT01-QK: AccuShot QK Stud Mount Atlas BT01-QK: AccuShot QK Stud Mount](https://cdn11.bigcommerce.com/s-llwpiff/images/stencil/300x300/products/1796/2521/atlas_bt01_400__94932.1445461742.jpg?c=2)
The BT54 Flushcup Stud is a novel means to attach/detach accessories to a Picatinny rail if the accessory has a corresponding flushcup hole that aligns with the slots of the Picatinny rail. The BT54 was conceived and designed for use with the BT53 SILO.