4-Slot Aluminum U.M.P. Picatinny Rail
Use your Picatinny accessories on your M-LOK handgaurds with this conversion system. Each takes up one M-LOK slot. UMP stackable design allows you add multiple of these side by side to create a continuous picatinny rail.
The outside is a Picatinny rail. The inside is the mounting system to the M-LOK handguard.
Hard anodized finish on 6061 T6 Aluminum