If the shooter shifts his front sight tunnel and front sight ring in heights or sideways, the results can be displaced without noticing. Shooters have to take the utmost care not to make a mistake like that. They need to make sure their eye is centred precisely on the rearsight iris on each and every shot. However, that is a very difficult thing to do, especially in challenging light conditions and over the course of long series.
The "Duplex" is an additional centring unit that relieves the eye and doesn’t place any extra demands on a shooter’s concentration. The intermediate ring that it produces gives the eye an extra point of reference that provides a clearer indication of an alignment error. Integrating this additional ring concentrically into the sighting line was a real challenge. The result is an X-Y adjustment-unit, the Duplex. Technology made by MEC & centra!
When every tenth counts, the Duplex is the answer. The logical extension to the Duplex is the Duplex-Vario. The centring ring is now variable and can be adjusted to suit personal requirements.
Two adjustment ranges are available. The 3.4 – 4.4 range has been developed for rearsights with short anti-glare tubes, such as the SPY and FREE-SIGHT. The 3.8 – 4.8 range, meanwhile, is intended for use with rearsights that have long anti-glare tubes, such as Anschütz and FWB models. The size of the centring ring should ideally be adjusted so that the light space (gap) between the iris aperture and the centring ring is relatively small.
That way, the tiniest misalignments are immediately apparent and your aiming becomes significantly more precise. If you need to readjust your iris aperture due to changing light conditions, or if you put a filter in place, you can also alter the adjustable centring ring of the Duplex-Vario to match – just as on an adjustable front sight ring. It is a solution that is convenient, but absolutely uncompromising.
The alternative to the centring ring – whether a variable model or as a fixed Duplex-Insert – is the “Duplex-Iris”. As a stepless adjustment system, it allows you to modify the gap between the front sight tunnel and iris aperture as required. If you close the Duplex-Iris so much that only a very narrow strip of light is visible around the front sight tunnel, you will be able to see every tiny aiming error. The Duplex-Iris is a popular choice among indoor air rifle shooters. We recommend the Duplex-Vario for outdoor shooters who fire from 50 m and 100 m and who will benefit from having a clear view of wind flags and other indicators.
Item Nr.: 310-19940005
