I would hope it's infinite so it levels up with us.
Prepare to be disappointed. It's a mark 1 weapon.
Don't get me wrong, it's very useful when you're rolling a new alt. And shooting people through walls in PvP never gets old. But once you're midway through Lt. Commander it's not all that useful any more, except for some occasional entertainment.
Right now most of my characters have one just sitting in inventory taking up a slot. For awhile my Tac VA had it equipped on his Breen for the lulz, but I decided it was more worthwhile to have him actually contribute noticeable damage rather than slowly paper cut the enemy to death.
actually equivalent to a MK3 19dps base, so i have been anticipating the release of the TR by using a MK3 phaser as my primary weapon. I am a capped out Tac, 35 dps no buffs, i can buff up and cap out my sniper shot at 700 or so damage with the mk 3. you can expect roughly the same output on the TR, but it wont really be useful in most ground pvp settings to be honest. PVE and some one on ones it might be very entertaining!
It's an interesting weapon, since it does kinetic damage and can shoot through walls, and the shell casings flying everywhere are a nice touch. It just doesn't do enough damage to be worth carrying around at high levels.