Ok guy's/Gal's
I ended up buying a Volquartsen Mark III extended Magazine Release. I got it in the mail today. I took the magazine release out of my Mark IV and compared it to the Volquartsen Extended Magazine release. They are exactly the same. The only difference is the Volquartsen has a relief cut angle so when inserting the Magazine it can't hang up on the Magazine release.
Put the extended magazine release in and it works great, No problems.
Just incase inquiring minds want to know. Very happy with it.