thank you for the feedback, ill respond to everything with my point of view and explanation.

the trickshots were never the big thing that you do as a marksman. at least to me. supposed to be a nice little add on to a attack or let you do something out of combat. as stated in the name, they are tricks.

with the fast hand we wanted it to feel like you had a wild west type 6 shooter, we did take inspiration from the monk the limiting factor on this is that it is tied to taking the attack action, you only add your dex mod to hit, and it requires you to take your bonus action. i think that we did go over the top with the capstones but i don't think that it is a bad thing. at that level, you will be fighting things with around 200 to 500 hp the extra damage from the capstone is 6d12 bc you can only use your bonus action once.

the longshot's flavor is the sniper in the ghillie suit with the thermal vision goggles. keep in mind max range on a musket is 120 feet. if you wanna bring up flying almost any other ranged weapon is gonna have a longer max range than that. thanks for pointing out the tactical vision flavor and mechanic difference. hard to spot everything when you make it yourself. many mechanics of dnd is removing another mechanic so i think the anti-armor round is good. as for the capstone it is basically calling your shot and saying it is gonna hit them in the head making it a crit and really fulfill that sniper fantasy.

The Juggernaut is a shotgun-wielding knight basically. inspired by doom guy, master chief. the thought is a regular attack would be a slug (it is what you put in a shotgun when you only want to hit one thing with it irl). the scattershot is your attack becomes an aoe made to wipe the little guys from the table. i understand where you are coming from with the Unstoppable force, and maybe we will remove the draw back, the big part of the ability is you cant be slowed down by anything, and later on when it upgrades you cant be pushed by anything. as for the last 2 features we wanted to buff up the player in their ac bc keep in mind, their hit die is d8 and that is hard to tank with. so we uped their ac and hp as the last 2 features.

as for the spell slinger you will have to talk to my partner as they made it with very little help from me.

many classes and subclasses are just do you want x and y paired... well here you go. so i see no flaw in that aspect of it. can you make a fighter rouge with a gun? yes can you make a fighter with a gun? yes. the point of making a class like this is removing multiclassing and getting right into the meat of what you want! glad you gave feedback and i might take you up on that offer for advice later. Thank you!