Holosun 509 Adapter, Black, Fits HS507C Footprint 509PLT-507C Available to order on-line. Ships in 5-14 days $39.99
Holosun 509 Adapter, Black, For Glock MOS 509PLT-MOS9MM Available to order on-line. Ships in 5-14 days $39.99
Holosun 407/507K Adapter, Black, For Glock MOS KPLT-MOS9MM Available to order on-line. Ships in 5-14 days $39.99