PRO ARMS Tritium Steel Suppressor Sight for MARUI G17 Gen5 MOS GBB

Machined steel construction Tritium ( Hydrogen-3 ) illuminated aiming dots for use in low-night or darkness Suitable for Marui Glock GBB Pistol NOTE: Tritium is an unstable isotope of hydrogen with a half-life of about 12 years, aiming dots will lose half of the brightness for about that period.