PICS BELOW show a couple of prototype muzzle brakes, "in the white".
They can come in this finish (anodised) or black dyed anodised (see the rest of the images for more information)
The standard sizes available are 21mm od & 19mm od.
1/2"UNF is the standard thread offered.
Ports can be in any arrangement of your choice, but to start off, the ones below are the first batch made up & ready to mail out.
These have a large dia port at 90-deg to bore, with a couple of smaller ports on the top...hopefully the pics will show the ports ok.
Depending on your thread you may have to add shims to get the brake to index, or possibly skim the rear face of the brake; extra material is added to the rear to allow for skimming off.
Let me know if you are interested (post your name below, with qty req'd) & I'll then make up a list of buyers and pass his details to you for bank transfer, etc.
MAKE YOUR CHOICES FROM THE FOLLOWING TYPES - ALL READY TO MAIL OUT
Main options are as follows:
A.
The original design with the large horizontal vent hole & the two upper vent holes (as per the "in the white" photos above)
Have about a dozen of these now ready to mail out. Available in 19mm OR 21mm, in a black anodised finish.
These may need indexing by adding shims/washers, or skimming the rear face, etc.
To fit 1/2"UNF (1/2"x20) thread - normal UK spec./same as P~H moderators - for £25 delivered.

NOTE: The 3 brakes to the left looked too light, so within an hour of the photo they'd been refinished & now resemble the four centre brakes.
The two extreme right brakes in the photo are typical one-off designs. If you want these - number them #1 or #2 (from the left)

B.
Plain aluminium muzzle brake. Made in 21mm (will double check this).
These are not as critical for indexing, as can be seen in the photo below. These have a stainless steel bushing, so they are "in the white" finish wise & cannot be anodised.
To fit 1/2"UNF (1/2"x20) thread - for £25 delivered
TO SELECT ONE - STUDY THE PHOTOS & PICK THE ONE YOU LIKE BY NUMBER - the brake on the left being #1, the last on the right being #7 - I've rotated them a little but kept their place order in each photo.



C.
As per A or B above, but you require a different colour finish, or a different thread pitch (1/2"UNEF, i.e. 1/2"x28 - or M15x1 - or M12 - etc.), or a different diameter to 19mm/21mm.
£30, delivered
ADD YOUR NAME TO THE LIST
e.g.Name, Qty, Dia, Finish
Demonic69, 1, (A) 21mm
Sim G, 1, (A) 19mm
USER1, 1, (A) 21mm
USER2, 1, (B) #3 & (B) #7
USER3, 1, (C) 21mm - M15 - black
...make sense??
NOTE ".22 MUZZLE BRAKE" - means .22 RIMFIRE
IF you want a .22 c/f brake then you'll have to choose an Option C brake, and order a mild steel version
...if you have questions PM me please.