Touchback?
 

On a free kick. R1 catches the ball on the 2 yard line. His momentum takes him into the endzone.
Touckback or not.

What do you think is the result of the play?

I believe that since he possessed it outside the goalline it is not a touchback and he must take it out. If he gets tackled in the endzone it would R's ball on the 2 yd line.

ART. 2 . . . It is a safety when:
a. A runner carries the ball from the field of play to or across his own goal
line, and it becomes dead there in his team’s possession.
EXCEPTION: When a defensive player intercepts an opponent’s forward pass; intercepts or recovers an opponent’s fumble or backward pass; or an R player catches or
recovers a scrimmage kick or free kick between his 5-yard line and the goal line, and
his original momentum carries him into the end zone where the ball is declared dead
in his team’s possession or it goes out of bounds in the end zone, the ball belongs
to the team in possession at the spot where the pass or fumble was inter cepted or
recovered or the kick was caught or recovered.

Your belief is correct.
bigjohn posted the applicable rule/exception to the rule.

Sort of correct. He said the runner MUST bring it out - there is no such requirement.

It is not anything until the ball is ruled dead in the end zone. There is also no such requirement to bring it out. If R does bring it out, then they will be down wherever they are downed as long as they remain in possession.

The exception is just to protect from a cheap safety for a player going into their own EZ.

Peace

In NCAA & NFL, the ball is dead and a series is awarded to team A (which was of course team K).

In Fed, this is interference by A/K with an opp'ty by R to catch the kick, and the ball is dead when caught. In NCAA & NFL it is also possibly interference.

In Canadian football, this is a touchdown.

You know he meant B. He asked if it was a touchback.

I thought it was a trick question, because the only code that comes close to making a touchback in that situation is NFL's, where it would be a touchback if the kick hadn't been a free kick.