One thing worth noting is that the 4Vic is substantially lighter than the Sweet Revenge. It's not that the Sweet Revenge is exceptionally heavy, rather the 4Vic is extremely light.
Let's take a quick look at the 4Vic's holster.
Here's the 4Vic and Sweet Revenge holstered for the right hand. The Sweet Revenge sits much deeper in its holster by virtue of being longer, but both are similarly secure.
Range wise, the 4Vic keeps up reasonably well. The first (top) barrel can get the usual grey trigger ranges of about 12-13m flat with Elite type darts, however the last (left) barrel does suffer from significant power loss, so its ranges are usually around 10-12m.
Accuracy is usable but not great, about what you'd expect for a regular Elite-firing blaster. It feels a little bit more accurate than a stock Sweet Revenge, though of course this section is a little bit subjective.
Rate of fire decent, however due to the stiffer prime I find it a little slower to fire than the Sweet Revenge. Depending on whether you one or two hand it, a ROF of about 2dps is entirely possible, but with only 4 darts isn't too practical.
The 4Victory is available for 20AUD from Kmart, and can go down to 15AUD in sales. 20AUD is a pretty good price for a hammer primed sidearm with a holster, considering the Strongarm is typically around 10AUD, and the Hammershot typically drops to 20AUD in sales. 15AUD is fantastic value for it.
Compared to most blasters you'd consider for sidearm role, the 4Vic is a little lacking in capacity, and the prime is also one of the stiffer stock primes you'll find on Nerf's pistol blasters. The 4Victory is smaller and lighter than most of its competitors though. Overall if you're looking for just a solid sidearm, the 4Victory is one to consider, but I'd personally consider the Sweet Revenge/Hammershot to be better. If you're looking for a small but still effective sidearm, the 4Vic is probably a better choice, though obviously depending on how small you want to go the Triad or Jolt may be better for you.
I'd say it's certainly worth considering picking up a 4Victory, especially if it's on sale/clearance. It's a pretty decent all round blaster.
Pros: Smart AR block makes reloading a little easier, extremely light compared to similar blasters, quite a bit smaller than most other hammer primed sidearms
Cons: Smart AR block causes power loss through successive barrels, low capacity of only 4 darts, unusually stiff prime
Rate of Fire: 2.5/5
Value for Money: 5/5
Personal Rating: 3.5/5 - it's a very solid blaster that has its merits over the usual Sweet Revenge/Hammershot as a hammer-primed sidearm. The capacity is quite small though. I personally prefer the Sweet Revenge because of the capacity, prime and consistency of power.