The MAC 11/9 pattern is a compact host that benefits more than most from a proper stock or brace, and A3 supports it with the HDA3 hybrid polymer stock and brace, a 1913 Picatinny adapter for other folding options, and a folding G3-style walnut stock from JMK Customs.
Note that MAC 11/9 is a separate platform from the MAC-IX, which has its own listing. Products here are fit-checked against the MAC 11/9 receiver interface specifically.
