Description
KLI 4.5mm/.177 Extended Hi-Capa Outer and Inner Barrel (AS-004A)
This KLI set provides an extended outer barrel and matching inner barrel for KLI’s Hi-Capa style pistols that fire 4.5mm (.177) steel BBs. Part number AS-004A, it replaces the standard barrel so that it protrudes beyond the front of the slide, giving the pistol the extended look associated with race and competition guns.
Hi-Capa style pistols are among the most customised handguns around, and changing the barrel is one of the most visible upgrades you can make. This set lets owners of KLI 4.5mm Hi-Capa pistols give their sidearm a longer, more purposeful profile, and creates a natural base for further custom touches.
Outer and inner barrel together
Because the set includes both the outer and inner barrel, the two are designed to work together, so you do not have to source a separate inner barrel to suit the new length. The extended barrel sits proud of the slide, changing the silhouette of the pistol and giving it a more aggressive look on the range.
Building on it
An extended barrel is often the starting point for a competition-style build. Depending on your pistol, the extra length can give you a base for a compensator or other muzzle accessories. Check what is compatible with your particular model before buying further parts.
Key features
- Extended outer and inner barrel set
- For KLI Hi-Capa style pistols
- For 4.5mm (.177) steel BBs
- Protrudes beyond the slide for an extended, competition look
- Inner and outer barrel supplied together
- Part number AS-004A
What’s in the box
- Extended outer barrel
- Inner barrel
Compatibility
This barrel set is designed for KLI Hi-Capa style pistols chambered for 4.5mm (.177) BBs. It is not intended for 6mm airsoft Hi-Capa pistols, and parts from different manufacturers are not always interchangeable even when the pistols look alike. Please confirm the make and model of your pistol before ordering, and contact us if you are unsure.
Care and maintenance
Fitting a barrel involves stripping the pistol, so work on a clean surface, make sure the pistol is unloaded with the gas or CO2 removed, and keep track of small parts. After fitting, check that the slide moves freely and the barrel is seated correctly before shooting. Keep the inner barrel clean with a soft patch and cleaning rod, and wipe the outer barrel with a lightly oiled cloth to protect the finish.
Who is it for?
Owners of KLI 4.5mm Hi-Capa style pistols who want a longer, competition-inspired look or a base for further customisation.
Please note: pistol not included. Fitting requires disassembly of the pistol; if you are not confident, ask an experienced technician.








