I dont see one for the 40la even listed on slimline's site.

If they had one, this would be the cats meow... http://www.slimlineproducts.com/onli...rted_pitts.htm

bisson makes one for the .46 but not the .40? might see what the differance is http://www.bissonmufflers.com/en/muf...mageField.y=11