Airsoft Canada - View Single Post - TM MP5 - Low velocity

Avenging Angel · August 1st, 2006, 00:53

Hey guys, I need some help with a problem I'm having but first, here's the stats of the gun.

TM MP5A4 HG
M120 Spring
Metal bushings
Poly Carb Piston
Poly Carb Piston head
Metal Spring Guide

The problem I'm having is that the gun is only shooting at 150fps with the current modifications. Before the upgrades were installed, the gun was shooting 285fps on average.

I can't figure out what the problem might be. I've replaced the O-ring on the piston head, I've tried 2 other springs (an M120 and a stock one) with the same effect of 150fps. The nozzle is also fine.

I guess what I'm asking is, what's the next step? What else do I need to try to get this thing working again?

August 1st, 2006, 00:53	#1
Avenging Angel Trader rating Join Date: Feb 2004 Location: Calgary, AB	TM MP5 - Low velocity - FIXED Hey guys, I need some help with a problem I'm having but first, here's the stats of the gun. TM MP5A4 HG M120 Spring Metal bushings Poly Carb Piston Poly Carb Piston head Metal Spring Guide The problem I'm having is that the gun is only shooting at 150fps with the current modifications. Before the upgrades were installed, the gun was shooting 285fps on average. I can't figure out what the problem might be. I've replaced the O-ring on the piston head, I've tried 2 other springs (an M120 and a stock one) with the same effect of 150fps. The nozzle is also fine. I guess what I'm asking is, what's the next step? What else do I need to try to get this thing working again?