J, you are absolutely right. My gun is a Century MISR that was sold
with US made parts and a regular buttstock and pistolgrip. The muzzle
mics out at .456". There is no hope of threading the barrel as it
stands today. I would consider tacking on an adapter if I knew where
to get one. I suppose I could sleeve it and thread it myself, but
geez, that seems like a lot of work for what in the end will be - a
Maadi MISR after all. I can onlt assume that the breaks you have seen
fly off where installed without checking whether the bullet would
strike the break on firing. At least I'm not that careless. Thanks for
your insight and great web page.

--- In Practical_Carbine@yahoogroups.com, "J. A. Freeman"
<jfreeman246@...> wrote:
>
> I have never been a fan of the pin on muzzle brakes as I have seen 4
of them
> fly off during firing. 2 on SKS's and 2 on Mosin Nagant rifles. Only
one of
> the brakes was found down range the next winter after the grass died
down.
> No real damage was done to the rifles except some deep scratches on the
> outside of the barrels.
> Maadi rifles barrels were turned down to one of two diameters .480" or
> .512" If the barrel is .512" you can thread it 1/2-28 which is the
standard
> size for M-16/AR-15 barrels. There are AK-74 type muzzle brakes
available
> with these size threads and also many other styles of brakes and flash
> suppressors.
> If the barrel is .480" I would get the muzzle brake of your choice
and have
> it tack welded on the barrel rather than pinned on.
> For info on the Maadi rifles click the link for the "Egyptian
Rifles" page
> of my web pages at
> http://mywebpages.comcast.net/jfreeman246/index.htm
>