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PostPosted: Fri Jan 12, 2018 8:15 pm 
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Joined: Fri Oct 18, 2013 7:37 pm
Posts: 796
Location: Montreal area
the fellow wrote:
PZAM wrote:
The blowback is a function of the nozzle which to my knowledge is identical on both the airsoft and airgun versions, so what you see in videos should be representative.

As to shooting low, you can't really compare because the airsoft has a "hop-up" adjustment that induces backspin to lift the BB, making it variable, and this not found on the BB version.

Please excuse me for the late response.

Does that mean that by adjusting the hop-up in this 6mm airsoft, the recoil can be stronger which makes the pistol more realistic?

Thanks.


No effect's on the recoil :? , the hopup only gives more or less backspin on the BB to make it go further before starting dropping...

So far to my experience, identical gun, 4.5mm or 6mm, have very close recoil/blowback... :idea: You may experience more recoil on 6mm gun by using a CO2 mag rather then a GBB mag... I did with my Glock 17 there is a difference but not that much... also I am using 0.25gr 6mm BB's it fly's slower but go further before loosing it's precision, good for target... 8)

The M'n'P 40 is distributed by Umarex, cause they have the licensing right, is a KWC gun and has an heavy recoil very close to the Tanfoglio... and gives a very good feeling. Hope for 3 full (15 shoot's) mag before loosing power...

And yes it feel' like it shoot low and left, I think it's the shooter because my GSG92 does the same... :?:

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BlackWater M1911A1(polished)
Glock G17 6mm
SW M'n'P 40, Crosman 357 6'', SA 1911 TRS
Brodax 44, M1911A1 twin barrel 6mm.
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PostPosted: Sat Jan 13, 2018 8:45 am 
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Joined: Wed Oct 29, 2014 10:49 am
Posts: 236
Location: QC
the fellow wrote:
Does that mean that by adjusting the hop-up in this 6mm airsoft, the recoil can be stronger which makes the pistol more realistic.


As silentman pointed out, the recoil is independent of the projectile adjustment.

In this type of blowback pistol, there is a floating valve that decides what proportion of gas goes to the blowback and what goes to push the projectile. It is possible to modify it in order to increase the blowback, but this mean less velocity.

Image

By weakening the return spring, or moving the floating valve closer to its closed position, it will shut off the barrel faster and increase the blowback force.

Note that this increases the stress on the blowback mechanism and can cause some components to fail prematurely, so I would not recommend modifications unless you have a good source of spares.


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PostPosted: Wed Jan 17, 2018 10:46 am 
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Joined: Fri Aug 31, 2012 9:05 pm
Posts: 14
silentman wrote:
the fellow wrote:
PZAM wrote:
The blowback is a function of the nozzle which to my knowledge is identical on both the airsoft and airgun versions, so what you see in videos should be representative.

As to shooting low, you can't really compare because the airsoft has a "hop-up" adjustment that induces backspin to lift the BB, making it variable, and this not found on the BB version.

Please excuse me for the late response.

Does that mean that by adjusting the hop-up in this 6mm airsoft, the recoil can be stronger which makes the pistol more realistic?

Thanks.


No effect's on the recoil :? , the hopup only gives more or less backspin on the BB to make it go further before starting dropping...

So far to my experience, identical gun, 4.5mm or 6mm, have very close recoil/blowback... :idea: You may experience more recoil on 6mm gun by using a CO2 mag rather then a GBB mag... I did with my Glock 17 there is a difference but not that much... also I am using 0.25gr 6mm BB's it fly's slower but go further before loosing it's precision, good for target... 8)

The M'n'P 40 is distributed by Umarex, cause they have the licensing right, is a KWC gun and has an heavy recoil very close to the Tanfoglio... and gives a very good feeling. Hope for 3 full (15 shoot's) mag before loosing power...

And yes it feel' like it shoot low and left, I think it's the shooter because my GSG92 does the same... :?:

I see. Thank you for the detailed reply. :)


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PostPosted: Wed Jan 17, 2018 10:48 am 
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Joined: Fri Aug 31, 2012 9:05 pm
Posts: 14
PZAM wrote:
the fellow wrote:
Does that mean that by adjusting the hop-up in this 6mm airsoft, the recoil can be stronger which makes the pistol more realistic.


As silentman pointed out, the recoil is independent of the projectile adjustment.

In this type of blowback pistol, there is a floating valve that decides what proportion of gas goes to the blowback and what goes to push the projectile. It is possible to modify it in order to increase the blowback, but this mean less velocity.

Image

By weakening the return spring, or moving the floating valve closer to its closed position, it will shut off the barrel faster and increase the blowback force.

Note that this increases the stress on the blowback mechanism and can cause some components to fail prematurely, so I would not recommend modifications unless you have a good source of spares.

I got it. Thank you for the thorough reply and the pic.


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