3/8 diopter front sight mount for 1/2 UNF or 1/2 UNEF

(1 customer review)


Use our 3/8 diopter front sight mount for 1/2 UNF or 1/2 UNEF and use match peep sight on your weapon. A rare part designed and manufactured in France for air rifles or small arms. Aluminum CNC machining.

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Mount a diopter front sight on your barrel thread

Yes, this time it is not a silencer or a flash hider that we’ll help you mount on your weapon. It’s a diopter front sight, or a globe sight as some call it. So make way for our 3/8 diopter front sight mount for 1/2 UNF or 1/2 UNEF.

The idea is quite simple: using the thread that many weapons have at the end of the barrel to fit a 5/8″ dovetail rail. It is on this rail that you can tighten your diopter front sight.

We focus on the globe sight problem, because very often air rifles or .22 LR rifles used by shooters already have an 5/8″ rail at the rear. The installation of the aperture part therefore presents no difficulty.

We offer you here the interface to coincide at the front, otherwise nothing is possible.

The 3/8 diopter front sight mount for 1/2 UNF or 1/2 UNEF : light and well made

It’s important. Because to facilitate flawless groups, the accessory must itself be machined with care.

That’s why we work in France on the latest generation of CNC machines. The concentricity is ensured, high end finish too.

In order not to weigh down your weapon, we make this adapter in 7075 T6 aluminum. It will thus be suitable for both a handgun and a long gun.

The 3/8 dovetail rail on which you can tighten the globe sight has a usable length of 21 mm (.827″). This is more than enough for most accessories of this type.

How does it work ?

The 3/8 diopter front sight mount for 1/2 UNF consists of several elements :

  • The barrel extension (to be tightened on the thread of your weapon).
  • Two transverse screws (to immobilize the sleeve on the extension).
  • The sleeve (3/8″ dovetail rail carrier).

To tighten the barrel extension at the end of your weapon with a wrench, you have an 18 mm (23/32″) hexagon. Note that this extension is bored to 8 mm (.315″) diameter. All projectiles below this caliber are therefore welcome.

The extension screwed, you just have to slip on the sleeve on it and index it in line with the aperture sight. This indexing is validated by tightening the two transverse screws supplied.

It’s simple, effective and lightweight. Oops, we did it again.

As a reminder : 1/2 UNF = 1/2×20 TPI and 1/2 UNEF = 1/2×28 TPI.

Choose yours from the drop-down menu on the right of the image !

Additional information

Weight 50 g
Dimensions 56 × 22 × 23 mm


Barrel thread

1/2 UNF (1/2×20 TPI), 1/2 UNEF (1/2×28 TPI)


Anodised aluminium

1 review for 3/8 diopter front sight mount for 1/2 UNF or 1/2 UNEF

  1. Paulo P. (verified owner)

    Awesome quality. Fits a Anschutz 1416HB perfectly

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