The SBA3 is designed to work all any mil-spec carbine receiver extension aka buffer tube.
The SBA3 is adjustable per buffer tube position slots.
The Noveske marked SBA3 will also include a 7075 aluminum MIL-SPEC 6 position carbine buffer tube and the SBA3 pistol brace features integrated, ambi QD sling sockets. MSRP of $139.95
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