M6X Tactical Laser A8 or A3

[gomaximo]

Hi,

I will buy a M6X Tactical Laser but I don't know if I must buy:

M6X-000-A8: Insight Technology M6X Tactical Laser Illuminator - Pistol, Glock

or

M6X-000-A3: Insight Technology M6X Tactical Laser Illuminator - Pistol, 1913

I have the GGG-1133SL HK USP Flashlight Adapter-Full Size,

Thanks for the help!!

MX.-

[H&K 4 LIFE]

The first one, the one for the Glock. :)