Adam,
I own a Para LDA 9mm which I bought for production.
I put a Schuemann barrel in it and because I am left handed, I wanted to put an ambi safety on it.
I contacted John Amidon for a ruling on the legality of this.
The answer was that it is okay because this type of safety was a factory option on some of the LDA models.
In other words, if the factory offers a part on some version of a production model LDA it is legal.
The basic criteria is: "If I add this part will it still be a production gun that could be bought from the factory in this configuration".
If I had a question about any given part, I would ask for a ruling.
Otherwise you may find yourself shooting Open.
Tony
Note: One of the reasons I haven't shot this gun in a production match is a problem with the mags.
The mag base is plastic and held in place with a small tab that hooks over the back of the tube.
This tab is not very robust and does not seem to hold the base very securely.
When practicing mag changes I often dislodge the base and push it forward, almost to the point of coming off.
I'm afraid I will dump all my ammo on the ground in the middle of a stage.
3rd party bases are not allowed.
Next time I bump into Todd Jarrett I think I will ask him how he gets around this problem.
Until then, the gun is on the shelf.
Are you shooting 10 round mags or standard capacity mags? The standard capacity mags have a little different set up which I have had zero problems with for over 25000 rounds.