What's my favorite 9mm SBR?

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I've been filing Form 1's like crazy in anticipation of 41F going into effect in July. I've been asked by several fans what my favorite SBR is. I share my thoughts on some of my most recent SBR 9mm sub-gun projects.

Full30: http://www.full30.com/
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Видео What's my favorite 9mm SBR? канала Military Arms Channel