How long does Tritum last in 2007 MFR TA01NSN ACOG?

[jrsteensen]

Picking up a TA01-NSN ACOG that was manufactured in 2007. How many more years should I expect the tritium to last, and how much should I expect to pay to replace it when the time comes? (If it's even worth replacing.)

[Unreconstructed]

half life is approx. ten years, so tritium brightness will diminish by half around every ten years.

I read trijicon quotes over $500 to recharge new tritium. Not worth it to me.

[jrsteensen]

Yikes! Meh, don't really need a night lit reticule on this rifle, so it will do fine, even after the tritium is dead and gone.

[bullittmcqueen]

The half life of tritium is 12-15 years. FWIW, my ACOG is a 2002 and the tritium is still going strong.

[jrsteensen]

That makes me feel a lot better. Thanks for the anecdote.

[Unreconstructed]

OK, I looked it up.

While tritium has several different experimentally determined values of its half-life, the National Institute of Standards and Technology lists 4,500±8 days (approximately 12.32 years)

[Unreconstructed]

The half life of tritium is 12-15 years. FWIW, my ACOG is a 2002 and the tritium is still going strong.


Actually, the brightness has diminished by half since it was manuf. 12 years ago.