Your AAP-01 feels different from the very first shot: tighter, calmer and far more predictable at range. This Stalker AAP-001 Upgrade Kit bundles the complete 84 mm barrel upgrade into one set, so you don't have to hunt down loose parts across five different shops.

What's included

• "Morpheus" Dual Bore AAP-01C/G-Series Barrel 84MM – SUS304 seamless steel with an enlarged, unbridged window for consistent grouping.
• SR Hop Bucking 60° (Purple) – a hybrid between an R-hop and a bucking, with an extended patch for maximum lift and a flat BB flight path.
• AAP-01 TDC + Prowler Hop Plate – replaces the stock hopup parts so you can adjust the hop from the top with a hex key.
• AAP-01 TDC Hole Tool – drills the hole in your upper in exactly the right spot for the TDC kit.
• AAP-01 Ultimate Spring Set (8 springs) – four recoil springs and four nozzle return springs to tune your pistol to your gas, mags and local temperatures.
• AAP-01 Marine Grade Stainless Steel Screw Set – A4 stainless screws for the upper receiver and internals, two of them with thread lock.

Why buy it as a bundle

These parts work as a system: the Morpheus barrel and SR Hop bucking deliver the precision, the TDC kit lets you fine-tune that hop, the spring set keeps the cycle stable, and the stainless screws make sure nothing works itself loose after a full day of skirmishing. One order, one afternoon of wrenching.

Good to know

• Made for the Action Army AAP-01 / AAP-01C. The 84 mm barrel is designed for the AAP-01C and Glock platforms and may fit other pistols.
• The TDC kit requires a 2 mm hole in your upper. The included tool makes it foolproof, but if you'd rather not do it yourself, hand it to your local tech.
• Always check your joule output after installation before you take it to the field.