46 results for m4

Apr 13

M4 SOCOM (recoil shock) gearbox

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Apr 13

M4 motor installation

When inserting the motor, make sure the POS side stays on the side closer to the trigger. The NEG side, on the other hand, should stay close to the rear end. Carefully arrange the wires, then install the end cap and put in the motor position adjustment screw. A quick test can then be performed …

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Jan 11

Photographic review of the KA Vltor M4

PROS: Just as practical as any M4 Great styling Comfortable to hold High quality body CONS: Gearbox needs to be fine tuned These photos show the architecture of the KA Vltor M4:      

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Jan 09

Photographic review of the older generation APS EBB M4

These photos show the architecture of the older generation APS EBB M4 gearbox:          

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Jan 08

Photographic review of the Deepfire M4 AEG

PROS: Very strong and reliable structurally Suitable for high FPS upgrade Good air seal out of the box CONS: No blowback Gearbox needs to be be fine tuned These photos show the architecture of the Deepfire M4 AEG:    

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Jan 08

Photographic review of the APS Hybrid M4

These photos show the critical elements of the APS M4 hybrid version:       

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Jan 08

Photographic review of the PTS ERG M4

These photos show the PTS ERG architecture:     

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Jan 06

About the PTS M4 ERG

The primary difference between a regular EBB AEG and a PTS M4 ERG is the gearbox+recoil shock unit. There is an extra recoil shock unit attached to the gearbox and extended into the butt tube for recoil shock action to take place. The PTS implementation does NOT support blowback though.  

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Jan 04

M4 pistol grip issue

Due to the extremely small space inside the M4 pistol grip, it is very easy for the wires to get in the way of the motor pinion. Also, adjusting the motor position is difficult as you may find it very tight to “push” the motor inward any further. You just have to be very patient …

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Oct 27

Errata for Practical PTS M4 High Power Upgrade 2014

If you have purchased the very first release of our Practical PTS M4 High Power Upgrade 2014 title, please be informed that the section that covers the hopup function needs to be amended as follow: The PTS M4 hopup chamber is NOT TM M4 compatible.  You cannot use a standard TM M4 chamber to replace the PTS …

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