If you are asking what to put on a gun, the answer is nothing. That is because you lack the experience necessary to know what you want out of a gun. There will be no meaningful alterations you can make to a Glock that will impact muscle memory in any meaningful capacity.

Practice, take classes, make friends, try out other people’s guns that have been modified, and you will understand what you are looking for in a shooting experience. Doing otherwise is how you end up with a box of parts that are the result of ignorance and inexperience motivating purchases.

What matters is that you can put lead where you want it to be and parts may help that feel easier, but firearms experience will give you better groups than a Gucci’d Glock.

If these Glocks are going to be your first guns, don’t change a damn thing. Maybe get the MOS versions to add a red dot in the future. I get what you’re saying about muscle memory and what not, but you really don’t want to fuck with the mechanisms of a gun you rely on for self defense. You further increase the possibility of malfunctions. Fine on a range, not so fine when bullets are flying.

Like others have said, spend that money on ammo. I promise you, getting really good at accurately firing and drawing a bonestock Glock will absolutely prepare your muscle memory for a “tricked out” gun. All you should buy is your guns, ammo, holsters, and if you have kids a safe storage container of some kind.

A dot if that’s what your into, a laser training cartiridge, and a good holster. Don’t mess with internals until you really know what you’re doing, Glock has engineered their guns to be reliable above all else and you can easily screw that up. Even if the trigger isn’t great people still regularly win competitions with stock Glocks.

Any gun you buy the most important thing is AMMO. This allows you to train which will be more important than any mod. I would say get quality but relatively cost effective ammo to get started on, 200 rounds is plenty for a first training day. Focus on your grip, there are plenty of different styles, you trigger pull, probably the hardest initially getting effective consistent technique, and sight picture. This will take time to master but this is your foundation. Once you get consistent try one day with different types of ammunition. Don’t buy the best and most expensive, unless you are able to consistently afford that ammo every time you go practice, since you should preferably train on the ammo you wish to carry, doesn’t help you train on cheap 124gr fmj ammo, yet carry a +p+ 148gr hp ammo and expect yourself to be consistent in an emergency. So lots of ammo to train and get consistent.

If you are looking at mods, just know you are changing the weapon, so reliability might/will be affected. But I like my mods but I only decided on them after a while. The initial mods I got when I first bought my first firearm lie uninstalled now in my safe since I realised how detrimental they initially were. But I do now have mods. So if I can give my mods I installed and currently carry on my 43x is the following: Flat Apex trigger, just love how much better I can feel my breaks. Ghost connector, like I said love how I can feel my breaks. I did a polish job on my internals, be careful not to have heat from polishing because they may warp or mess with your metal temper.

What I still wish to do is put better sights or a red dot, but for now I feel I am still very effective with the standard Glock sights, even if there are better sights available.

My biggest advice is actually, get ammo and a great holster. After that maybe a sights/red dot. After that you can go as much as you are willing to go. Flashlights increase usage during low light situations, the list is almost endless. You need to ask what you want to use the firearm for and get it ready for that.

I like to use the motorcycle example. Most people buy an 1000cc+ adventure bike with all the bells and whistles, side and top boxes, metal frame protectors, aftermarket performance shocks, led lights galore, GPS tracker, heated seats and grips… Yet they do not have the riding experience. Also they are 99% of the time going to drive to work 20-30kms away from home on a beautiful road during daylight.

They would have been better buying simple 400cc motorcycle for travelling on road, get used to the motorcycle and then decide what they use 95% of the time. Yes all the previous add-ons would come handy in that 1 time it may come up, but are you always using it? After a while they trade in the small motorcycle, upgrade to a 800cc commuter with only a top box to store their helmet and heated grips for their hands during winter.

Same with a gun. Sorry for the ramble and remember a gun is a huge responsibility, and the 4 rules of gun safety.

I know you’re wanting to be in the glock ecosystem, but have you tried the P series from CZ?

Glock is the AR of the handgun world since there is about a billion of them out there, but CZ I find is better in every regard. My wife was a glock girl until she started shooting my CZs.