Aero/Geissele Custom M-LOK rail

I am an AR-15 armorer, and this was a build for a specific purpose custom built for a user that passed away before he could take it.

It features an Aero Precision Lower with Geissele SSA-E trigger system. An 18" Ballistic Advantage SPR Rifle Barrel w/ OPS 12 Modern Series with rifle-length gas system. Geissele MK14 15" handguard MLOK (05-575). For comfort and stability, I used an old A2 Stock/buffer system for the rifle length buffer spring.

It has a weak-side BCM gunfighter charging handle, enhanced dimpled BCG release button, and Magpul MOE grip.

There is almost $1800.00 in parts on this rifle, so I am not negotiable on this.