1.) No
2.) Yes
3.) Once you convert it to a rifle i.e SBR, it cannot be made a pistol again.
4.) Once a rifle 922r applies and must be made compliant. Pistols as the SP89 is, does not need to be 922r compliant. Rifles do, which is what you will be making.
5.) It's not. It just allows you to attach a flash hider or a suppressor.
6.) No. The paddle release just is an extra and for many a convienient way to release the mag and you must engrave your mfg. info when it becomes an SBR. Nothing needs to be restamped.
2.) Yes
3.) Once you convert it to a rifle i.e SBR, it cannot be made a pistol again.
4.) Once a rifle 922r applies and must be made compliant. Pistols as the SP89 is, does not need to be 922r compliant. Rifles do, which is what you will be making.
5.) It's not. It just allows you to attach a flash hider or a suppressor.
6.) No. The paddle release just is an extra and for many a convienient way to release the mag and you must engrave your mfg. info when it becomes an SBR. Nothing needs to be restamped.