Not to be bagging on your ex-marine friend at all, but you should not take any one person's word as gold on any subject
Not even mine
This forum is full of separated and retired Marines (a marine once told me that there is no such thing as an ex-marine, just one that has left the service
), Army, Navy, and Air Force (myself included in the latter
) And we all disagree on many things.
If there was a perfect setup that worked for everyone, then everyone would have it.
Please, feel free to ask all the questions you want, don't be afraid to hold back, or be embarrassed, we all started at the bottom at one time :)
My opinion, and I think it is also the majority opinion, on Tactical Rails and specifically Flashlights, is that they are fine for LEO and Military use, but you really don't want one for home use,
especially if you have children. If you have the flashlight On the weapon, then you are forced to point the weapon AT what you want to illuminate. If you come out due to a sound in the middle of the night, and it is your child/teenager/family pet sneaking around, you will end up pointing the gun at them in order to see them, and that is a bad mojo violation of the 4 rules. Recommended is to have a Separate Flashlight to hold in your off hand or some other separate setup. Remember, Bad guys will most likely choose to shoot at whatever light you are shining at them if they shoot at you, so it's a really good idea to be able to hold it away from your torso and face.
On the laser, it is a good item to have in a high stress situation, (point and shoot, literally), however, it is not something to be solely relied upon. If you rely on it, and the battery dies, or it doesn't work for some reason, you are then SOL. Personally, the only time I turn on the laser at the range, is after I've already shot a lot with the sights, and that is just to make sure it is still zeroed properly. I also personally do not see a downside to night sights, other then a small added $$$, and I don't know why anyone would recommend NOT having them. They make it easier to use your sights, at night, if needed. You also do not need a Tac Rail for a laser. Look into Crimson Trace LaserGrips, or Lasermax Guide Rod laser sights. They both offer options for a laser sight without a tactical rail.
Items on a tactical rail, or even simply a handgun Having a tactical rail, will eliminate a large number of holsters available for that handgun. There are only a few holster makers that make them for handguns with rails, and AFAIK, VERY few make holsters for railed weapons with something mounted on it. Just things to consider.
There is a very big 'Tacticool' thing going on right now, and tons of 'Tactical' stuff is being pushed as a result of it. Sometimes you just need to step back and go 'do I really need 2 laser sights (one green, one red), an IR illuminator, a 4x scope and a 1x acog on my home defense rig?' KISS is the acronym most experienced people stick to when they recommend something you will have to be able to manipulate, with little to no thought, under extreme duress. My laser sight is activated by me just gripping my handgun properly. If it was a separate switch, I'm pretty sure I would not remember to turn it on if something ever happened in my home that required me to use it.
Sig Sauers are known to be accurate, however, many other handguns are just as, or at least very close to the accuracy level of the Sig. Also, most firefight situations happen at a range of 10 yards or less. A gun that can shoot a 1" grouping, vs one that shoots a 1.5" grouping at that range will hardly make any difference in the effectiveness of the weapon. The more likely cause of missed shots in a confrontation at that range is shooter ability. Stress, the amount of adrenaline dumped into the blood, etc, all play an important part in the ability to hit a target.
Some Acronyms you will need to know (sorry if I forget some, just pulling off the top of my head):
CCW = "carrying a concealed weapon" - A Generic Term for a concealed carry permit, since each state has it's own name for it.
IANAL = "I am not a lawyer"
IIRC = If I Recall correctly
AFAIK = As Far as I know
FFL = Federal Firearms License(e) - Term for someone who has a Federal License to Buy/Sell/Trade guns for retail purposes.
FTF = Face to Face
I'm sure there's more I'm forgetting, but I'm sure someone will not hesitate to agree/disagree with me on many points, and thats fine :) Healthy debate is good for all parties involved!
Have a great weekend!