Angled Foregrip with Battery Compartment

After I bought an H&K 416C, I didn't want to use the included PEQ box, and I wanted to have an angled foregrip. I designed this foregrip to have a small compartment for a 11.1V LiPo stick battery.
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## Version 1 ##
was far too large, it's handstop was too small, and the holes for zip ties were poorly designed. Additionally, the grip was acceptable, but it was still a little slippery.
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![Version 1][v1-1]
![Version 1][v1-2]
![Version 1][v1-3]

## Version 2 ##
is a step in the