Just received some interesting points from GREENO:
If that inability to remove the caps on the tubes without removing the stock really bothers you, just glue the tubes in and grind the locking part of the caps off, then drill a hole if you want in each of the caps and tether them like Vltor Caps (on this stock you could even tether them to the lanyard hole in the stock (right next to the battery caps) rather than to each other.)
The lanyard hole (my guess) was designed to 550 the stock to the rifle to prevent loss while removed.
Thats the beauty of a stock that isn't a $500 collectors item, you can modify it without destroying its value, in fact with RRA hardware and modded tubes, some people might be more interested in it.
-Austin
Well it looks like I will be modding my stock this weekend.
FREE