I own and BM M17 and love it. I chose it over my AR15 for home defense because of it reliability. I had KKF do some mod work and am very happy with the results. He installed an under rail, his personal designed compensator and side ventilation holes. I think the under rail is very important so that you can install a forward grip. This solves any heat issues. The +'s are short turn ratios for CQB work, long barrel for good accuracy, balance, reliability and ease of cleaning (no gas system). The -'s are trigger, can't mount NV or other gear on it due to lack of space (unless you get it modified) and is not friendly to left handed shooters. I paid about $650.00 for mine...
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C4