Condition: pre-owned
The elusive HK MR556A1, closely resembling the HK416 and marked with a warning on the magwell — a highly sought-after, long discontinued model. This lower will work with standard AR15, Heckler & Koch MR556, Heckler & Koch HK416 uppers. Only use this lower on a rifle upper, over 16" barrel or SBR it.
Radian ambi selector, ergo grip and QR laser code sticker on the magwell.
