Will using a 11.1v with a m90 spring damage my specna edge?

[Cyberwolf]

Just got a specna edge and wondering if using a 11.1v battery with a m90 spring will cause problems as I heard it can cause overspin, is this true? 

Thanks 

 

[Rogerborg]

Ahoy and welcome.

Specna Arms guns typically come with 2 springs, an M90 and an M120.  The M120 is too hot for a UK AEG (unless you seriously short stroke it or otherwise reduce the cylinder volume).  The M90 will notionally give you ~295fps with a 0.2g BB or 0.8J, fine for CQB but well under the 1.13J limit at most sites. However, it's all down to air seal and in practice they tend to come out a bit higher, I was seeing more like 0.9J with the M90 (and with spot-on air-seal and a tightbore barrel you can get >1.1J out of an M90).

A M100 spring is likely to get you closer to most UK outdoor site limits, but it's not an exact science and having a chronograph at home can avoid disappointment on site.

Back to the battery.  With an 11.1V and the stock motor and M90 spring in an Edge, I was getting regular double-shots on semi.  The basic mosfet in the Edge guns does nothing to prevent this, it's just there for trigger protection.  With the same battery and beefier motors (Big Dragon M140s) I was getting the same double shots in another M4 (M90) and a G36 (M100)

This is always a risk with 11.1V and if it happens there's not much you can do except fit a half decent mosfet with active braking and/or precock.

You might get lucky, you might not.

tl;dr version - you probably want 7.4V, and an M100 spring.

 

[Cyberwolf]

Alr thanks so much I did not realise that a m90 would shoot not great fps, I will properly stick with a 7. 4v and get a m100 like you also I am going to be using 0.28g bbs 

thanks 

 

[Rogerborg]

It should be usable enough with the stock M90 and 0.28g.  The Specna rotary hop unit is pretty decent, so its effective range won't be much short of anything else out there.  It just won't reach out quite as far as something tuned for bang on the site limit.  However, at that extra 5-10m you're rarely going to get hits anyway.

I'd run it as stock at least once to get a baseline in performance and see what the site chronograph says, then make a spring change decision based on that.  It's always better to come out 0.1J under than any amount over.

 

[Cyberwolf]

It should be usable enough with the stock M90 and 0.28g.  The Specna rotary hop unit is pretty decent, so its effective range won't be much short of anything else out there.  It just won't reach out quite as far as something tuned for bang on the site limit.  However, at that extra 5-10m you're rarely going to get hits anyway.

I'd run it as stock at least once to get a baseline in performance and see what the site chronograph says, then make a spring change decision based on that.  It's always better to come out 0.1J under than any amount over.

OK thank you very much 

Thanks