If it was that size and that weight and in 9mm I would trade in my Kahr CZ9 and buy the Glock with such a quickness the door at the gun store wouldn't finish closing before I left.
In 380 there are some people it might be a great fit for but it's not for me.
I don't know of anyone making longer buttpads for the tavor. Your best bet is to find a compensator or flash hider or whatever you like that makes the gun long enough and have a gunsmith pin and weld it. Or just get in a time machine and buy one a year ago. That's what I did.
Ideally #1 buckshot but since that is going to be hard to find stick with 00 buck. Buy a few different round and find a range where you can pattern them at 15 yards. Despite what movies would have you believe you want the one with the tightest group at that distance.
Most of the time it's about $55-65 to ship a handgun via UPS so you got ripped.
I have found the cheapest way to ship is to have a dealer do it because they can use USPS. My FFL locally charges like $25-30 last time I did that but that was 3 years ago.
The different operating system, the gas-delayed blowback action is interesting and hopefully it will help mitigate recoil which for a lot of shooters will really help but I don't know why I don't know why anyone would buy this gun based on size alone. It's a single stack P99c. If you are going...
A 3.5 lb connector will reduce the weight of the trigger pull but it will not bring the weight down to 3.5 lb. I have a Ghost 3.5 lb connector in my Glock 17 that I use for IDPA and USPSA and I have it in there mainly because it smooths the trigger pull not because it's lighter. (I've had other...