adjustable front sight

[NickyT]

Hi,
I'm looking for an adjustable front sight.
Now I 've a 4mm crystal-clear.
Which range I'll should get for a smaller ring? I need just a 'light' from the center to the ring.
thanx.

[40xguy]

(1) what's the distance from front sight to rear sight?
(2) are you using an "eagle eye?" (a magnifier in the front sight)
Both of these will influence the choice.

[Tim S]

Hi,
I'm looking for an adjustable front sight.
Now I 've a 4mm crystal-clear.
Which range I'll should get for a smaller ring? I need just a 'light' from the center to the ring.
thanx.

If you want an aperture under 4.0mm, get a range smaller than this. I think both Centra's and Gehmann's "small" size range is 2.3-4.3mm.

An aperture smaller than 4.0mm seems small for 10m Air Rifle.

[Pat McCoy]

The 4.3 maximum size on the small range sights is about the minimum you should use for air rifle. Larger apertures actually give better results, especially in standing. A sight with adjustments from 3.0-5.0 would give you more options.

It is better to err on the larger opening, rather than smaller.

[NickyT]

thanks for your replies.
the distance from front sight to rear sight is 77cm and I'm not using any magnifier. I've planned to buy an iris aperture (0,8-1,8) but not now.
I'm evaluating the MEC sight, but I'm uncertain between 2.8/4.8 or 3.8/5.8 range
have you some suggestions?

[Martin H]

Both the Gehmann and Centra (MEC) adjustable 3.8-5.8mm front sights will only achieve a minimum of 2.0 rim thickness.
The adjustable 2.8-4.8mm front sights have, or adjust down to a 1.6 rim thickness.
I find the 2.0 rim thickness appears very thick, especially at a 77cm sight radius and will take your eye away from the target too much.

I would get the 2.8-4.8 mm front sight as you will get better sighting because of the thinner 1.6mm rim thickness.
Cheers
Martin