I used Testor's model paint on mine. Before I did I called the ATF and was given the go ahead as it is permanently marked and the fill is readily removable.
100% Back in the 80's if you bought a hand gun and didn't have an LTCH we had to fill out the finger print card (lovingly referred to as a "10 card") and mail it in to the State Police. If we didn't hear anything back in 10 business days they could come pick up the gun. If they had an LTCH they...
I have 2 of them and like them a lot. I have the curved trigger as the flat one just doesn't feel right. I like the quick reset as well as the light pull.
Any link to the ATF "decision/opinion/notification" that you have to keep the upper versus it being "able" to be returned to the Form 1 listed length and caliber?