Just about any mag fed .22 can be used in NRL-esque rifle matches. Its the optic chosen that usually limiting factor or the inherent accuracy of the gun.
In NRL22, Base class isn't as cut throat as Open is. And if you fall under Youth, Ladies, or Old Gun....then its arguably easier yet. But not always.
If the t-bolt is what you got and you don't really care where you finish....just that your capable to go compete....your set.
Just have a decent target scope within the class limits, a bipod, and probably have a spare mag on hand for the 12rnd stages.
ALWAYS talk to the Match Director well before the match (like days before if possible) and show him your rifle and discuss which class you are capable of competing in or what would be the best fit for you. The MD will make sure you have a group that will support you or guide you if needed on rhe day.