How about a 4130 steel muzzle protector?
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1-1/8" od x 0.593" id x 8-1/8" long with a 0.71" > 0.708" taper cut 1/4" deeprecess for the 0.708" odbarrel sleeve. Threaded end cap has a 1/4" opening thatafter a coupledozen shots with the .22 cal model 52 hasremained 'lead smear' free.
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The requested matte finish looks quiteready to blue.
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Fun? Probably not . . .
(http://www.getphpbb.com/phpbb/images/smiles/eek2.gif)
A learning curve? Uhhm, yeah . . . that one ! ! ! (http://www.getphpbb.com/phpbb/images/smiles/a_okbyenow.gif)