RepairGearbox Rebuild & Diagnostics
V2 internals · Tuned AOE · MOSFET install
Now Booking · Q3 Build Slots
Airsoft repair and custom tech, done right.
Working airsoft techs handling AEG repairs, performance upgrades, SSG and DSG builds, and brushless conversions. Every job ships with chrono data and a written build cert.
Live Build · v3 DSG
SR-25 / 16:1 / 35rps
Trigger Response0.06s
Rate of Fire35 rps
Compression0.98 PSI Δ
ReliabilityA+
Ticket #6MMC-2418QA Phase
Secure checkout · Stripe
Visa · MC · Amex · Apple Pay
Insured UPS & USPS shipping
Build cert with every job
90-day labor warranty
150+
Total builds completed
4 yrs
On the bench
98%
Customer satisfaction
5–14d
Avg. turnaround
What we do
From a quick tune-up
to a one-of-one build.
Every service is performed by certified technicians using calibrated equipment and OEM-grade or better components.
Repairs & Diagnostics
Full teardown, fault isolation, and certified repairs on any AEG platform.
Start a requestHigh-Speed SSG Builds
Trigger response under 0.07s with sector-clipped gear sets and tuned MOSFETs.
Start a requestDSG Builds
35+ rps with full-cycle reliability. Pre-engagement and AOE precision tuning.
Start a requestBrushless Conversions
BLDC retrofits with active braking, programmable curves, and field-proven longevity.
Start a requestCompression Overhauls
Cylinder, head, piston, nozzle, and bucking matched for consistent FPS deviation under ±2.
Start a requestFeatured Builds
Recent work off the bench
Every build ships with chrono data, ROF results, and a digital build certificate.
Repair
CustomCustom AR Build
Custom finish · Carbon outer · Full overhaul
The Process
Transparent from intake to delivery.
01
Request a Quote
Tell us about your replica and goals. We respond within 48 hours.
02
Estimate & Approval
Detailed scope, parts list, and a transparent labor breakdown.
03
Build & QA
Bench-tested, chrono'd, ROF verified — every cycle.
04
Ship with Cert
Tracked shipping plus a signed digital build certificate.
What customers say
Trusted by players, milsim units, and pro teams.
4.9 / 5 · verified customer reviews
See all"Isaac built me the best DSG I've ever seen in my years of playing airsoft. The amount of testing, tuning and craftsmanship that went into the gearbox was well worth everything I put into it. Isaac is the only tech I'll have work on my guns."
Matt Ames
DSG Kriss Vector build
"Excellent service, advice, communication, and attention to detail — only the best parts installed with the best work. Tuned to perfection: shoots right at 350 FPS with a deviation of only 0.3 FPS. Lifetime warranty as the cherry on top."
Ben M.
13:1 CQB build
"Sent my CM16 for an accuracy upgrade and general maintenance and they absolutely delivered. Noticeable improvement to accuracy, fantastic communication, and a fantastic price. Highly recommend 6mmCustoms for any tech work."
Michael Powers
G&G CM16 Predator upgrades
Ready to build something serious?
Get a detailed estimate, timeline, and ticket number in under two minutes.
Start Your Quote