New CETME owner

[Brian O]

Hi everyone I have been lurking here since I got my new CAI CETME rifle. I was wondering if anyone here knows whether there is a decent HK gunsmith on Oregon? I will post a pic soon of the rifle although its just an all black one so not too exciting compared to the others I have seen here.

The reason I ask is that the rear sight is not any goo (something I did not notice when buying the rifle) and I want to replace it with the HK drum style which I just bought from robertrtg.com; I may do the job myself if I can find a detailed description of how to do it.



Thanks for any information.

[drine]

Turbothis! He's a member here. He may can help you. I'm not quite sure how well the HK drum lines up with CETME front sight. That could be worked out easy enough though by adding or taking away material on the rear sight.

And WELCOME to the site.

[Milsurp]

Welcome aboard.

[Smokehouse69]

+1 for Drine's suggestion.
Here's Turbo's website. http://www.mygunsnorthwest.com/

He is a wizard at building stuff, so I'm sure mounting an HK rear site on a Blackwidow would be well within his range! :thumbup:

[Brian O]

thanks guys, I had no idea that a good smith would be so close!
Seems like I have read that the sights will work together somehwere here

Another 2 questions my rifle is shooting reliably but in huge groups (I think this is due to the rear sight's poor quality) but any other opinion would also be appreciated. What is the proper sight picture/alignment for this rifle; I can shoot pretty well with the colt AR-15's but I had some training on that weapon.

[rifleman]

How are you looking through the sights. The front post is what you need to focus on with the ring making a blury halo. good breathing and all that jazz that you know. the rifle is heavier than the ar with more recoil so pace shooting comes to mind. with a 7.62x51 round grouping should be decent. how far are you shooting?

[hunter_la5]

The reason I ask is that the rear sight is not any goo (something I did not notice when buying the rifle) and I want to replace it with the HK drum style which I just bought from robertrtg.com....

I'm not sure if you realize this, but the sight-picture on the HK drum and CETME paddle-wheel sights are exactly the same. The only difference is that one turns horizontally to change elevation, and the other one flips vertically. Other than that, there is no difference. I don't feel like swapping sights is going to change much for you.

[hunter_la5]

What is the proper sight picture/alignment for this rifle.

This diagram should help:

http://www.hkpro.com/sights5.jpg

Focus on the front sight. The rear sight should be blurry. Your eyes should be close enough that there is just a thin ring of light between the inner ring of the rear sight and outer ring of the front sight. The front sight hood should sit evenly inside the rear sight aperture. Basically, you are just lining up one circle inside another to make concentric circles. Once they are lined up, the point of impact will be just above the post.

[hunter_la5]

Another 2 questions my rifle is shooting reliably but in huge groups (I think this is due to the rear sight's poor quality) but any other opinion would also be appreciated.

There are a number of factors that could be causing this:


improper sight picture/alignment
misaligned muzzle brake/flash hider
worn-out bore
bad crown
loose front sight pin
minor barrel obstruction, such as an improperly installed muzzle brake pin
the CETME's horrendous trigger

[Brian O]

actually I am switching the reatr sight for the HK style because the rear sight on my gun is all floppy and moves side to side about .020". I checked the clearance with a feeler guage. I don't mind the sight style- just the crappy build quality of my particular sight and If I am going to change it I might as well have the good stuff.

[hunter_la5]

actually I am switching the reatr sight for the HK style because the rear sight on my gun is all floppy and moves side to side about .020". I checked the clearance with a feeler guage. I don't mind the sight style- just the crappy build quality of my particular sight and If I am going to change it I might as well have the good stuff.

Ah, gotcha! :thumbup: Just wanted to make sure you realized that, because there have been plenty of people in the past who wanted to replace the CETME paddle with the HK drum because they hated the sight-picture, but didn't realize that they were the same.


You could probably repair that without removing the whole assembly, but if you want an HK drum, then it will work.

[Smokehouse69]

If you've got a Blackwidow with the Century patented loudner, it could be causing some problems with your groups. If the barrel wasn't crowned properly or the muzzle device put on incorrectly it could be messing up your groups.
If you get Turbothis to replace your site get him to check your muzzle device and make sure it it installed correctly.

[Brian O]

thanks for the list Hunter any opinions are appreciated as to the problem; perhaps I will have someone else who knows these rifles shoot it a little and see what their opinion is as to the problem.

Going through the list:
there was no pin installed to retain the muzzle break it was just threaded on there.
The barrel looks sharp inside (I checked)
I fully agree that sight pichture/alignment could have been a problem which is why I asked
hmm what is crown?
The trigger is pretty heavy on it as well.

My other rifle is a lee enfield which I am able to shoot with but I think the trigger is better on that weapon, the only reason I mention it to demonstrate that I have shot other weapons.

amazingly the bolt gap was within spec and the head is unground!

[Smokehouse69]

thanks for the list Hunter any opinions are appreciated as to the problem; perhaps I will have someone else who knows these rifles shoot it a little and see what their opinion is as to the problem.

Going through the list:
there was no pin installed to retain the muzzle break it was just threaded on there.

hmm what is crown?

The trigger is pretty heavy on it as well.


amazingly the bolt gap was within spec and the head is unground!

What sort of muzzle device, the one with the round holes in it or an HK type?

The crown is how the end of the barrel is finished. If it is uneven it can cause bullets to print all over the place.

I don't know how good Turbothis is on triggers but Bill Springfield is a darned good trigger guy. He is also very, very reasonable. He can greatly improve the pull of the trigger. You can send him just the trigger cage and he'll get it back to you pretty quick.

http://www.triggerwork.net/

[Brian O]

hk type I think, (the holes are like little footballs haha)