G'day folks,
As long as the barrel isn't already at maximum oversize [+0.060"/1.5mm, these days], GA Spares offer a changeover service via their dealers.

Way cheaper than getting one done as a one-off [unless you can get 'mate's rates'] - but this does require that your barrel has standard porting.

http://www.gaspares.com.au/program/...p;SEARCHSTOCKDESC=1&SEARCHSUPPCODE=1

Cheers,
Gadge

"ODK Mods can explain it to you, but they can't understand it for you..."

"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."