Quoted:
I am trying to understand the differences among the L3-Insight tech combo laser/tac light models:

SKU 6 76812 00027-1M6X-000-A17"M6X RAILGRABBER LG"  <has spare bulb, remote, no batteries>

SKU 6 76812 00026-4M6X-000-A15"M6X RAILGRABBER LG"  <has batteries, remote, no spare bulb>

SKU 6 76812 00023-3M6X-000-A1"M6X - SLIDELOCK - REMOTE, 1913" <has batteries, remote, no spare bulb>

This is actual information printed on product labels, and what I could glean from looking inside a sealed box.

At a dealer site, I was not able to open them (understandable), but I could glean some information.(I was able to spring the lids a bit w/o breaking the seals.).  

These things look an awful like alike.  Most of the kits I've seen even have a remote switch, which was not clear from the limited information on the mfgr web site.  

Your insights would be awe-fully appreciated.

mac