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FPS Fps seems low


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#1 thatguyx

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Posted 16 February 2011 - 08:10 PM

Hey, I recently got a Magpul FPG as a gift and have been playing around with it. The only experience I have with gas guns is a KWA M93RII NS2. So far the gun is pretty awesome, but its FPS seems a little low and inconsistent. Supposedly, the complete FPG should be shooting around 350-360fps out of the box. I've been playing around with it and my chrono and I've only been getting between 300-320fps, with occasional 340s.

Am I missing something? I noticed when I fill the mag, I can hear gas leaking out; with my M93RII mags I don't hear anything and it's shooting around 330-340fps. I'm assuming that's liquid propane going directly into the NS2 mag, but on the FPG mag it's not? Also, I let the mags warm up for about 5 minutes, but I didn't need to let the NS2 mag warm up to get to 330-350fps.  I stripped and lubed parts of the gun. Also, I'm running propane with a propane adaptor and silicone spray lube. Could it be something in the FPG or the mag? I have 3 AABB long mags on the way, so hopefully that will help me figure out if the magazine is the problem.

#2 xKingSizex

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Posted 16 February 2011 - 10:16 PM

Where are you applying the spray lube and is your hop up on when you chrono?

#3 axio

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Posted 17 June 2011 - 10:49 PM

View Postthatguyx, on 16 February 2011 - 08:10 PM, said:

Hey, I recently got a Magpul FPG as a gift and have been playing around with it. The only experience I have with gas guns is a KWA M93RII NS2. So far the gun is pretty awesome, but its FPS seems a little low and inconsistent. Supposedly, the complete FPG should be shooting around 350-360fps out of the box. I've been playing around with it and my chrono and I've only been getting between 300-320fps, with occasional 340s.

Am I missing something? I noticed when I fill the mag, I can hear gas leaking out; with my M93RII mags I don't hear anything and it's shooting around 330-340fps. I'm assuming that's liquid propane going directly into the NS2 mag, but on the FPG mag it's not? Also, I let the mags warm up for about 5 minutes, but I didn't need to let the NS2 mag warm up to get to 330-350fps.  I stripped and lubed parts of the gun. Also, I'm running propane with a propane adaptor and silicone spray lube. Could it be something in the FPG or the mag? I have 3 AABB long mags on the way, so hopefully that will help me figure out if the magazine is the problem.

Here is the problem.
http://www.kwausa.co...?showtopic=5811

#4 Acorn Avenger

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Posted 17 June 2011 - 10:54 PM

View Postthatguyx, on 16 February 2011 - 08:10 PM, said:

Hey, I recently got a Magpul FPG as a gift and have been playing around with it. The only experience I have with gas guns is a KWA M93RII NS2. So far the gun is pretty awesome, but its FPS seems a little low and inconsistent. Supposedly, the complete FPG should be shooting around 350-360fps out of the box. I've been playing around with it and my chrono and I've only been getting between 300-320fps, with occasional 340s.

Am I missing something? I noticed when I fill the mag, I can hear gas leaking out; with my M93RII mags I don't hear anything and it's shooting around 330-340fps. I'm assuming that's liquid propane going directly into the NS2 mag, but on the FPG mag it's not? Also, I let the mags warm up for about 5 minutes, but I didn't need to let the NS2 mag warm up to get to 330-350fps.  I stripped and lubed parts of the gun. Also, I'm running propane with a propane adaptor and silicone spray lube. Could it be something in the FPG or the mag? I have 3 AABB long mags on the way, so hopefully that will help me figure out if the magazine is the problem.
As for the leaky mags, your O-rings in the bottom of your mag could have poped out. you can get replacement O-rings at your local ACE Hardware.

Edited by Acorn Avenger, 17 June 2011 - 10:55 PM.


#5 axio

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Posted 17 June 2011 - 11:01 PM

View PostAcorn Avenger, on 17 June 2011 - 10:54 PM, said:

As for the leaky mags, your O-rings in the bottom of your mag could have poped out. you can get replacement O-rings at your local ACE Hardware.

I am so sure is not the mag problem...if your friend has a ksc glock 18 ect...try exchanging the FPG slide...you will get a much higher FPS for sure... the longer the inner barrel the higher the FPS that is the basic rule of GBB




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