How can KA Tech help your airsoft experience?

Step 1 of 4 Build or service?

What happens next

You send the requestIt takes a few minutes. The build plan and quote are free, with no deposit and no obligation.
A quote within 72 hoursA KA Tech technician replies with your airsoft build plan and quote.
You approve and orderPick it up in Orange, CA or have it shipped (US only).
Most builds ship within 45 business daysThe 45 business days are counted from your order.

Whether you already know exactly what you want or need us to help design it, every custom build starts from scratch — hand-picked parts, hand-tuned by our own technicians, built to dominate your field. No two builds are ever exactly the same.

Base platform

Engine price = engine + estimated install & tune

Performance targets optional

Your vision

What's the goal of the rifle?

SpeedsoftFast, close, high rate of fire Milsim build

MilsimRealism, long games, reliability Long-range build

Super far rangeOutrange everyone on the field Field-game build

Field gamesWeekend skirmishes with friends

How do you want it to look?

Carbon fiber & colorfulLight, loud, one-of-one Realistic build

RealisticAuthentic, milsim-ready look Clean minimal build

Clean & minimalUnderstated, premium One-of-one shop special build

Let the shop cookTrust the techs

Your HPA experience

First HPA rifleWe'll explain everything Run HPA beforeKnow the basics HPA veteranTalk shop with me

Already know some details? optional

What rifle are you converting?

What is it right now?

Engine price = engine + estimated install & tune

What should it become?

Budget

Timeline

Your air setup

Field FPS / joule limit optional

Pickup or shipping?

How should we reach you?

Name

Phone needed if you'd like a call or text

Text and email me about this request

This request only. We never use it for marketing.

One of our technicians replies within 72 hours with your build plan and quote. No deposit, no obligation — just a conversation about your rifle.

What's wrong with your rifle? tick all that apply

BBs not feedingInconsistent FPSInconsistent BBsBBs not accurateBBs curvingRifle not firingNot air efficientTrigger not workingAir leaking

Anything else? Describe the issue

We fix it with a Full Rifle Service ($250.00). Your answers go on your order with it.

Add Full Rifle Service to cart

PolarStar Fusion Engine™ HPA Drop-In Conversion Kit

$505.00+

An HPA engine gives your airsoft rifle better range, accuracy and consistency, and it lasts longer with less to break.
Maxx Model CNC Aluminum Hop-Up Chamber for M4/M16 Series Airsoft AEG Rifles

$95.00

Holds the bucking at the same pressure every shot, so BBs fly the same every shot.
Maple Leaf SUPER Macron Hop-Up Bucking for Airsoft AEG & HPA Rifles

$15.00

One of the most important parts of the rifle, for about $15. Best air seal and BB contact for consistent BBs.
Maple Leaf 6.02mm Airsoft AEG Tightbore Inner Barrel

$65.00

Steadies the BB and lets it get up to speed the same way every shot, for range and efficiency.
Speed Airsoft HPA M4 Tunable Trigger

$40.00

Lets you shoot faster.
Amped IGL Internal Airline – Standard

$40.00

An exposed macro line is one of the weakest points on an HPA rifle. This one is reinforced and adds a filter to protect your internals.