K31 Front Site Blades

Milsurphile

Milsurphile

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My new K31 (well, new to me!) shoots 8 inches high at 100 yards. I understand there are 5 different blades available (from shortest to tallest) marked: "-.", "-", no mark, "+" & "+." - I have the shortest one. Anyone know which blade I should be hunting for (I suspect the one with no markings) AND where they can be found? Thanks!
 
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Using a center hold. It is my understanding that a centre hold works for 100 & 200 yds (changes for 300 - center hold will be high) - My source is Bloke on the Range.
 
Milsurphile said:
My new K31 (well, new to me!) shoots 8 inches high at 100 yards. I understand there are 5 different blades available (from shortest to tallest) marked: "-.", "-", no mark, "+" & "+." - I have the shortest one. Anyone know which blade I should be hunting for (I suspect the one with no markings) AND where they can be found? Thanks!
Click to expand...

Yup. Right here..... www.swissproductsusa.com
 
Milsurphile said:
Using a center hold. It is my understanding that a centre hold works for 100 & 200 yds (changes for 300 - center hold will be high) - My source is Bloke on the Range.
Click to expand...

From the armorers, yes but age and private ownership can make a lot of changes in 50-60 years.

Read post #14 and at least do the pre-sight-in routine for the action and band screws before starting to shoot.
https://www.canadiangunnutz.com/forum/showthread.php/1889618-K31-Tunnel-Front-Sight/page2
 
Had to dig this up in my Old hard drive files.


K31
Blade Sight Marking -. - none + +.
Blade Height-mm 5.9 6.2 6.5 6.8 7.1
Δ POI (inchs) @300m -12.6 -6.3 0 6.3 12.6
Δ POI (cm) @300m -32 -16 0 16 -32

Each step roughly = 1.93 MOA (6.3 inch/3.3(100s of yds))=1.930303


So Each step is about a 2 inch difference at 100yds.
PM me if you still want a +. blade.
I may still have one.

Or you can order from Swiss Products these over tall blades and trim down the blade tip to suit your rifle.
https://www.swissproductsusa.com/product-page/k31-100-yd-sight-blade
 
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Thanks to all, especially diopter - Thanks for all the great information! Will try swissproductsusa for over tall blade and follow the pre-sight-in routine.
 
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