The Econo Can Suppressor comes as a complete unit with the oil filter attached, serial numbered and registered with ATF/NFA. If or when you need to change the filter out, the ATF/NFA rules says it needs to come back to the original manufacture, which Cadiz Gun Works is. The cost is $25.00. The complete Econo-Can Suppressor can be shipped directly to us, for gunsmithing, which would be replacement/rehab/repair of the oil filter, with the serial # remarked, and documented as being replaced/rehabbed/repaired. The completed Econo Can Suppressor can be sent back to you at your address on your NFA Tax Stamp Form. You do not need to go though a dealer for gunsmithing services. The life of the oil filter varies depending on caliber used and bullet type.
Hmm,.... I swear, when I checked into these a while back, only the adapter was registered with the ATF, (At least for the folks selling the adapters alone. ) Is it possible this company is trying keep selling folks $5 filters for $25
When you dig deep enough on their website, it IS there in black and white that the filter is registered and serialized