hk91 barrel on a cetme??
can i swap the barrel from an hk91/g3 to a cetme??i like the shroud verses this ugly flash hidder on mine..is this somethig i can do or would i need a gunsmith if it is possiable
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Hello Slidder, you sure have a lot going on with these rifles! Too bad I did not meet you 15 years ago when I was still an HK dealer. You have two problems working against you my friend: First off any barrel from an HK-91 will be threaded for a flash hidder and an actual surplus G3 barrel will, in addition to the threads, be capable of launching a rifle grenade- the "ring" to do this is located just ahead of where the barrel joins the front sight/cocking tube mount. Both of these features are no-no's and make your rifle a dreaded assault weapon under the 1994 Crime Bill.
The only way to remove the launch ring would be to put the barrel on a lathe and turn it, so you can forget the surplus G3 barrel. The barrel for an HK-91 will either have to have its muzzel cut and recrowned or you can purchase a compliant muzzel device that is NOT a flash hidder, screw it onto the barrel and attach it in one of these four ways: use a full fusion weld around the circumference of the device attaching it to the barrel. Use a total of 4 tack welds at 12, 3, 6, and 9 o'clock- make sure all four welds make full contact with the barrel. You may also use high temperature silver solder to secure the device. The use of industrial thread locker- "locktight" is specifically probibited by regulation. As a final choice you can drill the barrel to accept a taper pin, put the muzzel device in place, drive in the pin home and then weld the pin completely to prevent its removal. These are only four approved methods.
You last problem is the actaul barrel swap. Changing out a barrel on an HK/CETME is no project for the at home hobbiest. Removing the barrel and re installing a new one is tough enough, but head space on these delayed blowback rifles is CRITICAL and you'll need to get it spot on. You will need the services of a gun smith without a doubt. This ain't no AR-15! Your project can be done, but I don't think it is worth the time, effort, and money. Just my opinion.
Mark T. Christian0 -
In addition to what Mark has already told you, the front sight is usually another critical factor ... although the front sight is pinned (the front sling swivil serves double duty), it also has a hi-temp solder holding it in place on the splines ... I believe this is why so many of the Cetme's and G3's have sights that are off center. The proper way to replace as Mark pointed out is not a job for just anyone ... I've seen some real hack jobs by some home builders. If you are using a used barrel, the sight base should be removed, turned 180 degrees from the original pin hole and the barrel pressed in through the receiver, then when the correct head space is achieved (0.1mm - 1.5mm measured at the gap between the bolt carrier and the bolt head seen through the mag well) then the cross pin hole needs to be drilled, the front sight reinstalled ... Ideally you would have a fixture to insure the splines are correct to the receiver and would keep everything lined up while pressing the barrel in ... which by the way requires around 600 ft/lbs of pressure (sorry I forgot what the metric equilivent it [:I])
One nice thing about it is, this way you dont have to have a lathe to remove the grenade launcher ring since its part of the sight base you just remove it while you have it off ...
As I stated in another thread, there are several qualified smithes around that can do it for you but your looking at around $200 in labor alone, plus the barrel; plus shipping both ways ... at least you don't have to ship it overnite ...
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Chance favors the prepared mind
kimberkid@gunbroker.zzn.com0 -
well heck....thanks for the info...guess i'll leave well enough alone.just a thought 0
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