The Imperium is the high-cadence custom AAP-01 from Custom Lab BDU. Designed for competition and full-auto use, it combines a lightened bolt, a reinforced upper, and calibrated springs to push the rate of fire well beyond a stock configuration—all assembled, adjusted, and chronographed in the workshop.

Components included:

• Black Action Army AAP-01 base, reinforced polymer.
• CTM Tactical Advanced V2 bolt, 7075 aluminum, 27.5 g, skeletonized design.
• FUKU-2 CNC Short Upper Set V2, 6061 aluminum, gold electroplated, 151 g.
• CTM 200% nozzle spring and CTM 160% recoil spring.
• Complete TTI hammer kit, anti-breakage reinforcement.
• 14 mm CCW thread protector.

Compatible options:

• Maple Leaf Decepticon 60° hop-up bucking.
• Nexxspeed or Action Army hop-up unit for fine adjustment.

AAP-01 Base:

• Switchable semi-auto and full-auto modes.
• Power ~300 FPS with green gas (≈350 FPS with Nimrod Black).
• 14 mm CCW thread, thread protector included.
• Compatible with Tokyo Marui Glock-type magazines.
• Adjustable hop-up, compatible with Maple Leaf VSR10 barrels.
• 0.28 g BBs recommended.

What the Imperium brings to the field

The CTM 200% nozzle spring and CTM 160% recoil spring, calibrated for the shortened CTM V2 bolt, shorten the slide cycle: we measure 45 to 50 rounds per second in full-auto. The reduced weight of the bolt also improves heat dissipation during long bursts, and the absence of a screw hole eliminates a known failure point. If the full-auto bug is familiar to you on a standard base, our full-auto repair guideexplains why the TTI kit solves the problem at the root.

Why choose the gold FUKU-2 finish

Beyond performance, the Imperium is recognizable by its gold electroplated FUKU-2 upper. The Diamond Gold process deposits a hard layer that resists scratches, holster abrasion, and UV, and maintains its shine over time. The enlarged hop-up chamber accommodates TDC systems, and the Picatinny rails accept a red dot without machining.

A tested assembly, not a kit to build

Assembled by Custom Lab BDU, the Imperium arrives adjusted and chronographed. Our Custom Lab methodologydetails each step: parts selection, assembly, adjustment, and ballistic control before shipping.

Other AAP-01 Custom BDU builds

The Imperium is all about rate of fire. If you're looking for discretion, the Tenebraeoffers an iridescent finish and a minimalist profile. For capacity and compressed air consistency, the Sol Invictus HPAaccepts M4 magazines. The Rubiconfeatures a red Speedsoft signature, and the Argentumis the compact silver CQB choice. Compare all builds on the Custom Lab BDU page.

To get the most out of the Imperium: our customization guideexplains the CTM bolt + springs + FUKU-2 upper synergy, the maintenance guidedetails the inspections to plan, and our articles cover degassing, broken hammer, and hop-up adjustmentwith 0.28 g BBs.