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1/25/2012 4:41:10 AM EDT
Hey guys, sorry I can't post pics of the problem I'm having right now, but I'll do my best to describe it.

I have a Wasr-10/63 that works well, but the rear sight block seems to be shifted/rotated to the right a little bit, as though it were installed crooked. I'm worried that this may be difficult to fix.

One thing that I did find interesting was that when I bought Tech-Sights, I had to move the rear aperature all the way to the right, to a similar degree that the original front sight block seems to be out of place. When I look directly down the long axis of the receiver with the old standard sights on, the rear sight leaf is definitely sitting crooked. The Tech-Sights thing has me worried that maybe the barrel isn't parallel with the axis of the receiver or something ridiculous.

If I could simply reset the rear sight block somehow i would be happy.

Can I fix this? I know it's not just a bent sight leaf because the while sight block isn't in line with the rest of the gun.
1/25/2012 6:57:45 AM EDT
[#1]
With out a pic I can't see how other than replacing the rear sight block entirely if its that and not the trunnion and sight... it would help a lot if you can post a pic.. Now its cake to fix the leaf  you can adjust the mounting points it would be easier than replacing the whole base.... pics, Pics,
1/25/2012 7:19:05 AM EDT
[#2]
ok, well i am not at home, nor will i be for some time. BUT, I think I can narrow down my question into something that can be addressed without pics:

Is it possible to rotate the rear sight base around the barrel?
1/25/2012 10:51:03 AM EDT
[#3]
Yes. However, the amount it can be moved is limited. The RSB fits between the "ears" on the trunnion. Before you go to the trouble of straightening the base I suggest that you measure the space between the outside of the RSB and the inside of the "ear" on both sides in order to determine how far it can be moved.
2/7/2012 3:30:23 PM EDT
[#4]
I have the same problem as OP except it's a noticeable cant to the left. I'm rather disgusted that it's in my new SGL21. So how do you loosen up the rear sight base so that it can be rotated slightly?
3/13/2012 5:50:58 PM EDT
[#5]
My problem was similar.  I read all of the advice but I got a hydraulic press and used my bench vise as well.  I removed all of the removable parts and discovered the reason the hand guards were so tight. The barrel was a few degrees off top center to the left when it was reassembled. The pin way and the slots for the lower hand guard in the barrel were both off top center to the left. I also found that the RSB was also off of top center as I can insert feeler gauges between the RSB and the trunion. I suspect that when I press out the barrel I will find the correct pin way as well as the slot drilled to reassemble the AK. It seems that the gas block and the FSB will be properly aligned and no longer canted, or at least not as badly canted, I will also press out the pins in the RSB and drift it off and realign the RSB and then straighten the barrel. It seems the barrel leaned to the right when pressed in. If the pin slots aren't right, then some careful time with a round file will nail it.

The hydraulic press and the bench vise make it much easier. I welded some round stock together with off set to press out the barrel in the manner illustrated by the LeigionArms web site, http://www.legionarms.com/pages/Building-Instructions.html.  They show to versions of the tool.

Everything went back together very smoothly.

However Dfariswheel made good points when he wrote “ Installing a barrel is a much larger job then correcting a canted front sight.
A barrel has to be pressed in and that requires some kind of special pressing device or a big shop press, then you have to drill the barrel pin hole which is a good place to screw up a barrel and receiver unless you do it right.
To install a new barrel you also need a set of heads space gauges to set head space. In the AK, the barrel is pressed in until head space is right, then the barrel pin is drilled and installed.

Also, first you have to find a really new barrel, then there's a chance the new barrel may have canted sights or gas block, which puts you right back where you were.

You're over thinking this.
LOTS of people have gotten Romanian AK's with canted front sights and have fixed them themselves with ordinary home tools.
Really all you need to do it is a short starter pin punch which you make by cutting a Sears punch off to about a 1/2" working length or a nail set, some wood and possibly a buddy to brace and support the barrel, a proper size drill bit, and either a rubber mallet or a block of wood and a hammer.

Installing a new barrel in an AK is a big job requiring more tooling then most home shops have, and possibly more than the average local gunsmith might have unless he works on AK's.
Fixing a canted front sight is really not a major gunsmithing job.

I'm not sure I agree, but it depends on your skill level.  Freezing the part with dry ice and then heating the part the pins needing drifted out of does hepl the pins move.

IMHO
3/14/2012 5:56:47 PM EDT
[#6]
Rear sight block canted?  As Poly-pam noted, you only have very limited room to move the RSB.  If sighting-in is a problem, I would really look hard to see if your FSB is canted.  That is a really easy fix.   http://www.novarata.net/Linx310/fsbcantfix.shtml

If you really need to rotate your RSB, just knock out the retaining pin, rotate the RSB to where you want it, and redrill and pin slightly oversize.  A Romy RSB pin should be 4mm.  Just drill slightly over this, make a pin from an appropriate drill shank, and pin it.
5/14/2012 9:55:59 AM EDT
[#7]
A quick note is if you build Ar.s the firing pin is the perfect size for a replacement pin for the rear sight pin to the barrel... You just have to cut it down to the right width.
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