Does anyone know of a good vertical grip that works with the FIRSH?  My Global Tactical grip would not slide onto the rail.  I would like one with a compartment inside that would hold two N cell batteries.

The rails are a standard size so any of them -should- fit.

For battery storage check out the one from GG&G.

Oh, yeah, I forgot to mention.  I don't know if you have the same problem with yours, but my FIRSH seems to have the rails 2-3mm to close to the tube, thus causing (2) problems.  1.) the foregrips won't slide easily onto the rails because of the top inside edges hitting the tube when its being slid on.  I had to file down the two inside top corners of my AAC to "miss" the tube itself.  2.) Because the rails is slightly lower, the upper rails the rails on the tube don't match up on the top like the Oly pic shows.  LOL, these were problems I encountered, but it dosen't really matter to me, since it dosen't interfere much with how I use it.  Good thing about the AAC is that its polymer, thus easy to file down.  Unfortunately, the AAC dosen't have the compartment to hold batteries.  

Ghost

found one from [url=http://www.arizonagunrunners.com/Products/GGG/1169/1169.html]Arizona Gun Runners[/url]

I can get it to you for $54.76 shipped
IM me and i can give you the details

I have a KAC and just used a scope ring bolt to put through to keep the grip on.  The tension end of the screw cap doesn' touch the FIRSH because its missing the middel part of the rail.

I was thinking of this grip.  It doesn't SLIDE onto the rail like most.  It BOLTS on.  What do ya all think?

[img]http://www.ergogrips.net/brmhvfg.jpg[/img]
$60 at [url]http://www.ergogrips.net/vfg.html[/url]  Looking for a place to get it cheaper.

i can get you one from brownells for $40 check it out at[url=http://www.brownells.com/aspx/NS/store/ProductDetail.aspx?p=8775&s=21425#21425] Brownells[/url]
dosent have any internal storage

You've got an IM message.  BTW, it says it has storage on the website.  [b]Storage compartment lets you carry spare batteries for sights and night vision devises.[/b]