The Saiga 12 is a great shotgun, but it is important to clean up a few things before you can be comfortable with it's reliability. The gun is designed to cycle heavy loads, and will not normally function too well on lighter bird/target load. I was able to do all of the modifications to convert it to the proper pistol grip configuration, and re-profile/polish the bolt and carrier so that it works flawlessly no matter what I feed it. The internet is your friend. Go visit the saiga forum, and check out the "How To's" on the conversion and bolt polishing. All it takes is a dremel kit and some patience.
Once you clear up those issues, you can just have fun with it. I joke around about my Saiga 12 being my "zombie" gun, as it looks really bad-a$$... but it's not my first choice for home/self defense. I built it because I love the AK-47 platform, and there are limitless options available for customization. They are a blast to shoot, though mine is pretty heavy. One thing is for sure though... it's an attention grabber.
Parts used:
Carolina Shooters Supply DIY trigger guard conversion kit (Includes modified Tapco trigger/hammer group)
ERGO AK47 pistol grip
Tapco T-6 stock
CAA Tactical adjustable cheek rest
Tapco VFG
UTG extended quad rail
Burris Fastfire II
Burris Fastfire II protector mount
Promag 10 round magazine (gen 2) I have others, but prefer these..
UTG rail covers on the bottom rail, generic ladder rail covers on the sides
MT-1280 Barrel Shroud from Alumalite US. (very sharp teeth)
(Please excuse the poor quality camera phone pics)