Installing Meprolight 18801 Night Sights on Walther P99/PPQ - Full Install & Tips

18801 is the part number for these sights
Full MPNs are:
Set: 0188013101
Front Sight Only: 0188013107
Rear Sight Only: 0188013108
These come in green tritium only. It is part of the Tru-Dot family so they will show as white during the day.

Meprolight 18801 RS - .3350” Total height (Bottom of dovetail to top edge)
-.4090” width of dovetail
18801 FS - .2105”

P99 OEM Rear sight (from bottom to top edge) is 8.01mm/.3155”
4 different OEM front sight heights physically numbered 3, 4, 5, 6 (4 was installed to begin with)
ROUGHLY. Incredibly hard to measure
3=.1670”/4.25mm
4=.1740”/4.43mm
5=.1910”/4.86mm
6=.2005”/5.09mm


0:00 Intro
0:15 P99 OEM Sights
0:36 Uninstall of Front Sight
0:57 Uninstall of Rear Sight
1:43 Explaining Rear Sight
2:16 Walther Manual
2:34 OEM Front Sight Measurements
3:06 Mepro 18802 Compatibility
3:25 Disassembling Rear Sight
4:07 Mepro Heights vs. OEM Height
4:29 Assembling Mepro Rear Sight
4:49 Explaining Walther Front Sights & Compatibility
5:40 Setting up Windage Screw
6:15 Inserting Mepro Rear
7:17 Setting the Retaining Pin on Windage Screw
7:45 Adjusting Windage Screw
8:06 Explanation of Tru-Dot
8:35 Installing Mepro Front Sight
8:57 Loctite Usage
10:32 Mepro 18801 and 18802 vs. OEM Height Difference
11:15 Conclusion