Originally Posted by c3shooter
Take it easy on polishing, IIRC, these are mainly aluminum- including the barrel (steel liner) and no, barrels of rifle and pistol will NOT interchange.
Main issues I can recall are (1) Magazine, and (2) Barrel retaining nut loosening up.
Feed ramp is part of the mag. Round nose will feed better than flat tipped. Stout springs, need High Velocity ammo. You will spend time tweaking magazine lips.
C3 hit the nail on the head.
I went through several magazine adjustments with my charter arms AR7 before it would cycle right. The only part that won't fit the pistol is the rifle barrel, the alignment post is on the side on the pistol, top on the rifle. The rifle barrel would be in a position where the bolt would not fully close, and the front sight would be of to the side.
Feeding problems. Use a dremel to remove about an eighth of an inch (at an angle) from the bottom of the chamber to lessen the feed angle. Go slow and be careful, remove too much and you will lose accuracy.
Parts are plentiful and easy to come by. use your search engine and you will find several supliers. Have fun with your new project, and keep us posted.