Which M4???

[Moses015]

The two people I know personally who run PTW's both had them fail on them at Nightfall 4 and have been problematic the entire time. They both switched to their KWA's (which I was running that day as well) and were rock solid.

I say KWA all the way myself, but as someone said, so much is based on opinion here.

[EOD Steve]

Originally Posted by Wrath144

I have two bolts and as of today a KWA ERG. In my opinion the KWA is the best feeling and most solidly built AEG M4. Bolt has better compatibility and technically better stock internals. Without further information on what you're looking for I'd recommend the KWA over the bolt, but in some situations the Bolt would win out.
I plan to create a well documented tuning and compatibility guide for the RM4 as I build mine up as I haven't been able to find much information on tuning this system.

Upgrade-wise the ERG only needs the following:

• New piston (confirmed fitment with old ZCI pistons, Lonex red)
• Lonex A1 or Tienly 35k
• Ported piston head (any will do)
• O-ring nozzle (have had success with ZCI and SHS)
• Lonex V2 cylinder head (any others will do as well)
• FET (have used Gate FETs but if you can fit a small 3034 unit in there it would work as well, but Active braking with this platform feels great)

The hop-up unit also needs no replacement and readily accepts all after market barrels and rubbers. Long-travel arm with rotary dial.

[shelcoof]

Originally Posted by EOD Steve

Upgrade-wise the ERG only needs the following:

• New piston (confirmed fitment with old ZCI pistons, Lonex red)
• Lonex A1 or Tienly 35k
• Ported piston head (any will do)
• O-ring nozzle (have had success with ZCI and SHS)
• Lonex V2 cylinder head (any others will do as well)
• FET (have used Gate FETs but if you can fit a small 3034 unit in there it would work as well, but Active braking with this platform feels great)

The hop-up unit also needs no replacement and readily accepts all after market barrels and rubbers. Long-travel arm with rotary dial.

Any tips on disassembling the gun to get to the gearbox plus opening the gearbox?

Planning on installing a Mosfet in there and was just wondering if the gun is drastically different than any other AEG out there.

I've opened several AEGs from different Brands but never a KWA ERG.

Thanks