Custom AR-15 in Tucson, Arizona For Sale

For sale is a custom AR-15 with lots of upgrades:
- Spikes Tactical GMP Dissipator-style upper, mid-length gas system, 5.56, 1x7 twist, light-weight barrel
- PSA Lower w/ letter filling, mix of Colt and Daniel Defense parts, mil-spec tube
- Magpul MOE grip and trigger guard
- Magpul CTR Stock, mil-spec
- KAC M5 rail w/ KAC vert grip, Magpul XTM Panels
- Aimpoint CompML3 w/ Larue Tactical M68 CCO Cantilever mount and Aimpoint covers (extra battery inside, lower 1/3rd cowitness)
- Matech 600m BUIS
Asking $xxxx. Looking to trade for Mk12 SPR uppers, high-end 9mm railed xxxxs, CZ 75 SP-01, or high-end 11.5" AR uppers w/ low-pro gas blocks.