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Front Aperture Modification
Posted: Mon Sep 23, 2013 6:10 pm
by dlinden
Anyone with experience in cutting off the side bars on an adjustable front iris? The size I want doesn't come in a circle only configuration.
http://www.champchoice.com/SearchResult ... Words=9801
Thanks - Dennis
Posted: Tue Sep 24, 2013 3:23 am
by Tim S
Is the iris set into glass? On some irises, the side bars are what holds up the iris.
Posted: Wed Sep 25, 2013 3:11 pm
by redschietti
and in some, they are easily removed...ask the seller
Posted: Wed Sep 25, 2013 4:00 pm
by Thedrifter
goodness what length barrel and tube are you running to need a 5 to 7mm front apterture?
Gehman makes a 3-5mm that i use on my 26+8" configuration...
Posted: Wed Sep 25, 2013 4:24 pm
by Tim S
He may have an eagle eye. Alternatively, just a large element. Back when I shot with a 12in tube on a 27in barrel I had a 5.7mm element. It;s now 26 = 6 with a 4.8mm.
Posted: Wed Sep 25, 2013 8:02 pm
by dlinden
I have a 27" barrel and want to try a tuner/extension tube, but I am also using a plus diopter in the front sight. With that sight radius, you need an aperture greater than 6.0. I don't write the laws of physics, just follow them.
Learned today that Gehmann is now selling a larger adjustable diopter that doesn't have the side bars. It is just a circle.
Dennis L
Posted: Mon Oct 21, 2013 6:08 pm
by mobarron
If you know what size you need, Centra makes fixed apertures mounted in clear plastic for 18mm and 22mm. Less expensive than the variable and they don't break. Mike barron