Ameriglo Trooper tritium sight set for Glock 20 and 21 - green tritium dots front and rear. Made for full-size 10mm and .45 ACP Glock frames. Specs Front + rear sight included Tritium illumination for low-light visibility Drop-in install on listed Glock models - no special tools needed Fitment Glock 20 Glock 21 GLOCK is a federally registered trademark of Glock, Inc. and is one of many trademarks owned by Glock, Inc. or Glock Ges.m.b.H. Neither 3CR Tactical nor this site are affiliated in any manner with, or otherwise endorsed by, Glock, Inc. or Glock Ges.m.b.H. The use of "Glock" on this page is merely to advertise the sale of aftermarket Glock-compatible pistol components. For genuine Glock, Inc. and Glock Ges.m.b.H products, visit https://us.glock.com .