Originally Posted by
stony275
Grant,
If my response constitutes a thread hijack, I apologize and feel free to delete this response.
Re: the hybrid idea.
Take the rectangular body of the X series, but "bend" it so that is straddles the 12 o'clock rail on either side with the batteries housed at the 10 and 2 o'clock position. Have the lamp assembly at the 12 o'clock but as low as possible. Have the provision for push button or tape switch or both e.g. at the 10 and 2 o'clock positions behind the battery compartment.
Hopefully, the result is shorter than the Scout light, has a lower profile and is easier to activate on a carbine than the X series lights.
Actually, it would fit on the 3, 6 or 9 o'clock positions, but I'm trying to optimize it for the 12 o'clock position.
Kevin B's carbine rail setup is very similar to mine, i.e. rail extending in front of the FBS.