The reversed angle matches up with the pad of your thumb sooner than the factory button. You will find the gun in your hand just by grabbing it. Weak side draw becomes much faster as well.
The wider release button means you have even less potential to miss the activation, especially on thigh rigs or mounting systems that push the holster away from your body.
If you have ever found yourself pulling up on the gun before hitting the release you've noticed that gun is difficult to almost impossible to get out. The additional leverage of the Nub Mod fixes this stress induced or poor training problem if it ever arises due to the increased surface area for the thumb to engage.
Many find the button too small and glue or plastic weld onto the button to make it larger. This has the potential to make the typical homemade button get pushed over into the body of the holster rendering it inoperable.
The machined aluminum piece is indexed in part by the outside edge of the factory button. It will not come over the edge of the holster. It is bead blasted then hard anodized.
Simply press the larger nub piece over the factory button. Align the smaller narrow piece with the top of the larger one. Insert screw and tighten with supplied allen wrench. You may add Loc Tite or finger nail polish to the threads if desired.
Click the picture for details on each type.
SLS or ALS
A fellow Marine Snipers take on the Nub Mod.
Lots of reloading info, Nub Mod is discussed starting at 21:45.
Note: The lever shown with a hole in it was a for a prototype Nub Mod, no drilling is required!
Available for both the ALS "Level I" and the "Level III" SLS/ALS holsters.
A 3 Gunner's take on the Nub Mod.
A dedicated 1911 Nub Mod is now available!