Version-labelled selector · live Skirmshop catalog
MDRX Build & Buy
Choose the base platform first, then the exact subsystem. Product cards below use current Shopify handles; stock and price are live. Compatibility statements remain tied to generation, configuration and official part references.
1. Choose the base platform
AEG and HPA are different builds. Do not combine AEG ECU/motor/spring instructions with an HPA engine. Standard 16-inch and Micron also use different barrel and handguard groups.
mdrx-v3,silverback-mdrx-micron-v3,silverback-mdrx-16-hpa,silverback-mdrx-micron-hpa,silverback-mdrx-hpa-conversion-kit
2. Hop-up and accuracy path
First establish a sound seal and repeatable hop. The high nub adds 500 µm preload and is intended for BB heavier than 0.32 g; it is not automatically the correct choice for every energy/BB setup.
silverback-nubs-hop-up-nub,silverback-mdrx-hop-up-bucking-80-rubber,silverback-aeg-flat-hopup-rubber-pack-80-red,stalker-morpheus-inner-barrel-420mm-silverback-mdr-x
Rubber & inner-barrel workshop · High-nub workshop
3. V3 gearbox and electrical service
Use MDR-9801 for V3 GB1 internals and the V3 ECU manual for programming/polarity. Legacy V1/V2 parts should not be substituted by name alone.
silverback-ecu-v3-mdrx,silverback-piston-v3-mdrx,silverback-spring-guide-v3-mdrx,silverback-mdrx-v3-gearbox-screw-set-steel,silverback-mdrx-gearbox-o-ring-set-complete,silverback-mdrx-o-ring-set-v1-v2-v3
4. Spring and energy setup
Springs tune energy; they do not repair a poor hop or seal. A stronger spring can increase current draw and mechanical wear. Chronograph the finished replica with the BB used and obey site/local limits.
silverback-aps-spring-60-newton,silverback-aps-13mm-spring-90-newton,silverback-aps-13mm-spring-100-newton,silverback-aps-13mm-spring-120-newton
Official spring workshop →
5. Magazines and 5.56 / 7.62
The V3 manual shows both configurations. A complete change requires the matching adapter/receiver arrangement and magazine catch; buying a magazine alone does not prove conversion compatibility.
mdrx-ar15-120rd-magazine,silverback-78rd-mdrx-ar10-magazine,silverback-mdrx-magazine-adapter-ar15,silverback-mdrx-mag-catch-5-56-aluminum,silverback-mdrx-mag-catch-7-62-steel,silverback-mdrx-follower-replacement-5-pack,silverback-follower-tac-mdrx-magazine
6. Barrel, body and service tools
Match 16-inch or Micron groups in MDR-9802. Maximum torque is 3 Nm on barrel clamping screws and 2 Nm on handguard screws.
silverback-mdrx-16-outer-barrel-black,silverback-mdrx-10-5-outer-barrel-micron,silverback-mdrx-16-handguard-with-hardware,silverback-mdrx-micron-handguard,silverback-mdrx-v3-screw-set-except-gearbox,silverback-mdrx-rail-system-pins-4x,silverback-saca-pasadores-mdrx-accessory,silverback-mdrx-cylinder-head-wrench
7. Optional HPA engine: piece by piece
Depressurize before service. Silverback recommends no more than 8 bar / 116 psi. Nozzle ranges are manufacturer selection bands, not guaranteed energy values: 1 hole below 1 J; 2 holes 1–1.4 J; full-flow/6 holes above 1.4 J. Always chronograph.
silverback-mdrx-hpa-hop-up-unit,silverback-mdrx-hpa-nozzle-1-20-flow,silverback-mdrx-hpa-nozzle-2-40-flow,silverback-mdrx-hpa-nozzle-6-100-flow,silverback-mdrx-hpa-o-ring-kit,silverback-mdrx-hpa-hardware-kit
Factory dwell is 12 ms; optimize only after setting a compliant pressure/nozzle combination and verifying with a chronograph.
Nozzle workshop · Dwell workshop · Conversion workshop
8. Exact-reference ordering rule
| You have |
Consult |
Order only after |
| V1/V2 AEG |
MDR-0000 + older user manual |
Confirming the old reference and fitted layout. |
| V3 gun/body/barrel |
MDR-9802 |
Matching document page, assembly and reference. |
| V3 GB1 gearbox |
MDR-9801 |
Matching the precise GB1 reference and variant. |
| HPA engine |
MDR-9803 + FCU manuals |
Confirming nozzle/engine/FCU configuration and safe pressure scope. |
Need a number? Use the searchable 248-reference manual appendix. Product availability does not prove cross-version fitment.
Which MDRX version do I have?Which manual or workshop applies to my replica?Which parts are safe for my AEG or HPA setup?
