It really comes down to how much you believe the internet drama people. Name one lawsuit, or consumer protection group that has singled in on the m305 rifle and you will see that these wouldn't be sold if they were unsafe.
Sure some folks will paint a mystical aura around how they know something unsafe about them, but they're blowing defects out of proportion and labeling them safety issues. These people kind of hump the line between hearing themselves talk and attacking a product so they can talk about how much cooler their guns are. It's trolling, without the finesse needed to troll properly, while getting trolled by the people who play long enough just to keep them talking.
I'm probably the dumbest person on this forum, and I have owned an m305 for 6 years, but I wouldn't recommend one to someone on a budget because the ammo is expensive. The SKS and surplus ammo is just as fun and way cheaper, durable as well.