Smallbore target shooting and rabbit shooting are two completely different disciplines requiring totally different rifles.
For smallbore target shooting you are going to need a heavy weight rifle with target aperture sights.
For rabbit shooting you will need a lightweight rifle fitted with a 'scope preferably with a threaded muzzle and moderator.
The rifles you have mentioned certainly won't do the job for target shooting, you would need something like this:
For vermin shooting the rifles you have enquired about could be used but generally might be considered to heavy or cumbersome. The AR clones in .22LR have long magazines which will get in the way if you want to shoot prone, especially with a bipod support. Some will also, because of the design have the scope mounted high above the barrel which can be a disadvantage in a .22LR at closer ranges. Something like this might be more suitable:
Before you consider getting any sort of rifle for target shooting you will have to join a club and do a mandatory probationary period of between three and six months to become a full member before you can have a Firearm Certificate (FAC). During this probation you will be taught range safety and how to shoot safely.
If you choose to do vermin control you will need permission from a land owner before the police will grant you an FAC. Your FAC will be closed initially, which means you may only shoot on land cleared by the police.
One thing you might consider is that the rifles you mentioned are all military looking and this can put land owners off. The last thing you want is to lose your permission, as that means your FAC will be revoked if you have nowhere to shoot.
If you search my recent posts you will find a brief outline of what is required to get an FAC. Read it as it will give you a lot more background information about getting an FAC and what is required.