5KU Picatinny M1913 Rail Stock Adapter for Umarex/ VFC MP5K GBB ( 5KU-350 ) For APS X1 / GBox GBB The butt stock is enlarged

The butt stock is enlarged to fits 2000 mah battery

4V Custom Crane Type Battery ( Optional )

This hand guard is fully compatible with aftermarket airsoft guns under (ASR / M4) series in MIL Spec

Key Mod forend used in shotgun is extremely rare in the market

The patented design of 2 rotations (Inner silver / outer bronze) allow better air sealing and pierce of the Co2 caninster more easily

5KU Picatinny M1913 Rail Stock Adapter for Umarex/ VFC MP5K GBB ( 5KU-350 ) For APS X1 / GBox GBB The butt stock is enlargedManufacturer: 5KU SKU: 5KU 350 Aluminum construction M1913 20mm rail for JC style folding mech For UMAREX VFC MP5K GBB Series