Here's the full parts list of what is included in the standard Doubletrouble kit:

1. Front Crossbar

2. Back Crossbar(laser engraved)

3. Connecting bar(has the holes for the tripod mount)

4. 2 FC102 trigger cranks--$39 each

5. 1 Crank handle

6. Crank Connecting rod(with set screws)

7. Crank Connecting rod adapter(for fine tuning the cranks)

8. 360 degree swivel elbow

9. Quick disconnect nipple

10. Tripod mount

11. (2) 3/4" bolts(for connecting A5s to front crossbar)

12. (4) 5/8" bolts(for connecting tripod mount and rear crossbar to the connecting bar) 

13. (1) 7/8" bolt(for connecting A5 grip and front crossbar to connecting bar)

14. (1) small bolt to connect crank handle to crank.

15. (2) Lapco A5 bottomline adapters w/ (4) flush mount bolts(to connect to rear crossbar)