VAARVGFLKM mounts to KeyMod slots, VAARVGFLML mounts to MLOK slots, and VAARVGFLPR mounts to picatinny rails.
Yes, as long as you select the mounting method that corresponds with your rail system (M-LOK, Picatinny, Keymod).
I would recommend reaching out to the manufacturer directly for assistance. You can find their contact information using the following link:
https://www.ncstar.com/company-info/contact-us/
This should work for any caliber if mounted to the appropriate M-LOK, Keymod, or Picatinny handguard.
I'd think with enough leverage, one could break just about anything. As Archimedes is credited with the statement, “Give me a lever long enough and a fulcrum on which to place it, and I shall move the world."
This is as secure as other picatinny accessories, and is covered by warranty.
Mark H.
The bottom of the grip unscrews to install the batteries.
This grip is made of injection molded polymer, which can have issues with breakage, but the reviews we have seen of the item on our site and on a number of other forums tend to say that this item is durable and works well.