Best M4 gun to upgrade?

[HmblSqd-Luke]

Hi all

Just wondering what people think is the best electirc M4 to upgrade?

I've got a TM NGRS that I've abused and want to get something reliable and strong but also really accurate with upgrades.

 

[Jez_Armstrong]

Just service the TM? 

 

[Rogerborg]

Hmm.  Did you resolve the hop issues with your TM?

I'm asking to try and determine whether (and how much) you really want to be tinkering.

Most modern M4s are pretty decent, and rotary hops and well-featured fire control systems are becoming common. The only "upgrades" I'd suggest are a Maple Leaf hop rubber and nub, clean the barrel, and run the heaviest BBs that your budget and hop unit can stand - not 0.2g!

Are there any must-haves for you that would help to narrow it down?  Metal receiver, fire control system, rotary hop, quick-change spring?  Are you sure you want to give up the NGRS blowback?

 

[Galvatron]

To play devil's advocate, what's to prevent you from condemning yourself to the same or even a worse fate when, using your own words, you've abused your gun? 

Prior to the problems you're experiencing, did you rule out your ammo being the issue and not the inner barrel? As Rogerborg said, you should aim to run the heaviest BBs your hop can lift. A heavier BB should be more accurate at distance on the same gun because it has more mass to be less affected by crosswinds. When I play outdoors, to paraphrase Linda Evangelista, my primary won't get out of its case for less than 0.28g. For skirmishing, I wouldn't personally recommend 0.2g on a primary.

 

[Cannonfodder]

If reliability is your main concern then the best thing you can do is leave the internals alone. 

As others have posted use heavier bbs and set the hop up accordingly