This is a 20mm square alloy extrusion with 5mm slots in each face. This 1500mm long rail will do for most MPR and small L1.
It accepts Klima 5mm rail buttons also sold here
PLEASE NOTE! The Air Launcher base shown is not included. It is shown for illustration purposes only. Mounting hardware for the Air Launcher is included.
If the price seems VERY high, it is because this long bit of alloy gets zinged by the courier for extra carriage. If only we could cut it in two...