Well after talking to a detective he told me the same thing barrel no less than 16" and overall no less than 26" so I cut mine at overall length of 26.40" with a 16.25" barrel. now the problem is finding a nice bipod for this magazine, I think I will only use the 10 round magazine for now. and I still need to sand the stock a little. But it feels good. its longer than a charger for sure but still nice.