Airsoft Canada - View Single Post - Umarex MP7 not emptying magazines with full gas load

Jay_Swan · May 24th, 2017, 10:16

Hey everyone,

Long story short, my buddy bought a used mp7 from a friend and the first times I tried it it worked fine even at low temperature. Now that the summer is here we played a couple games and he noticed that he is not emptying a full mag with a full load of gas. After a few mags the last one shot once and the mag emptied itself of all gaz in the locked back position. In the first shot he got 420 fps then 400 then 370 then 330 all the way down to zero on all of his mags so I am guessing that the problem is in the gun itself.

I have not stripped the gun apart yet as to find some advice on a possible solution that you guys would recommend first because it will be the first gbbr that I take apart and I do not wish to screw this up. Maybe some seals are worn out, or maybe too much gas is delivered in the blowback, maybe the nozzle is broken... I will change the seals even then as per normal precaution but maybe some enlightened fella could show me the light :cool. Thank you for your help!!!

May 24th, 2017, 10:16	#1
Jay_Swan Trader rating Join Date: Mar 2017	Umarex MP7 not emptying magazines with full gas load Hey everyone, Long story short, my buddy bought a used mp7 from a friend and the first times I tried it it worked fine even at low temperature. Now that the summer is here we played a couple games and he noticed that he is not emptying a full mag with a full load of gas. After a few mags the last one shot once and the mag emptied itself of all gaz in the locked back position. In the first shot he got 420 fps then 400 then 370 then 330 all the way down to zero on all of his mags so I am guessing that the problem is in the gun itself. I have not stripped the gun apart yet as to find some advice on a possible solution that you guys would recommend first because it will be the first gbbr that I take apart and I do not wish to screw this up. Maybe some seals are worn out, or maybe too much gas is delivered in the blowback, maybe the nozzle is broken... I will change the seals even then as per normal precaution but maybe some enlightened fella could show me the light :cool. Thank you for your help!!!