JMAC Customs HRD - Hand Retention Device 

After running the JMAC customs HRD on my BRN180 I knew it was what I wanted on my AR9 setup. Hand rests perfectly against it and allows you to pull it right back into your shoulder. Small with not much to get hung up on things. Also very light weight so aren't adding much to your build. Highly suggest snagging one up for your build from Brownells or JMAC customs directly.
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