From the ATF letter to Mossberg:
“If the design, dimensions,configuration, method of operation or materials used were changed, our determination would be subject to review.
Note: materials and would.
Could you get away with it ? Probably but I would not want to have my gun seized, hire a lawyer and get in a fight with ATF.
Then the full force of the government would have you in its sights. Warrants to NSA to recover every word and keystroke, IRS reviewing your tax filings, FBI looking at every NICs form you ever filled out and that doesn’t even begin to cover referrals to your state/city agencies.
Were Ruby Ridge and Waco wrong ? Yup, but all the dead people are still dead and no one was held accountable.
Remember what Gump said--------