Battery retention.
The G2 doesn't have a ledge to keep the batteries from impacting into the lamp assembly.
THe weaponslights have that ledge, keep the shock away from the lamp.
VIP in a heavy recoil weapon like a shotgun, not as critical in a 5.56mm like the AR.
Still, since my life depends on it, I went for a weaponslight from Brightflashlights and stuck the G2/Z32/Fobus on my secondary weapon.
The shock isolated bezel is only part of the solution.
The weapons lights also stop the batteries from jamming forward into the lamp assembly.
I tried the 6P route, but decided to upgrade to the weapons light to ensure it's survival, and mine.
I've put my 6P on a secondary weapon now.
Loads of pics:
[b]SF223AC battery (note, mine was cut accidently, so I just taped it together)[/b]
[img]http://photos.ar15.com/WS_Content/ImageGallery/Attachments/DownloadAttach.asp?sAccountUnq=141&iGalleryUnq=995&iImageUnq=16610[/img]
[b]Z32 anti-shock bezel[/b]
[img]http://photos.ar15.com/WS_Content/ImageGallery/Attachments/DownloadAttach.asp?sAccountUnq=141&iGalleryUnq=995&iImageUnq=16611[/img]
[b]6P vs Z32 bezels[/b]
[img]http://photos.ar15.com/WS_Content/ImageGallery/Attachments/DownloadAttach.asp?sAccountUnq=141&iGalleryUnq=995&iImageUnq=16623[/img]
[img]http://photos.ar15.com/WS_Content/ImageGallery/Attachments/DownloadAttach.asp?sAccountUnq=141&iGalleryUnq=995&iImageUnq=16624[/img]
[img]http://photos.ar15.com/WS_Content/ImageGallery/Attachments/DownloadAttach.asp?sAccountUnq=141&iGalleryUnq=995&iImageUnq=16625[/img]
[b]6P - note NO battery retention[/b]
[img]http://photos.ar15.com/WS_Content/ImageGallery/Attachments/DownloadAttach.asp?sAccountUnq=141&iGalleryUnq=995&iImageUnq=16616[/img]
[b]6p vs 950 weapon light - note retention of batteries[/b]
[img]http://photos.ar15.com/WS_Content/ImageGallery/Attachments/DownloadAttach.asp?sAccountUnq=141&iGalleryUnq=995&iImageUnq=16620[/img]
[img]http://photos.ar15.com/WS_Content/ImageGallery/Attachments/DownloadAttach.asp?sAccountUnq=141&iGalleryUnq=995&iImageUnq=16619[/img]