Ar-9 project. Includes Spikes Tactical 9mm lower. Upper receiver, bolt, barrel, buffer are Foxtrot Mike, extra Aero precision barrel. I started building this AR9 and got distracted with other projects. The spikes lower receiver is compatible able with Glock mags and has last round hold open. The lower is mostly stripped with the exemption of bolt latch an mag release.
What length barrels are they?
What length barrels are they?