Airsoft Canada - View Single Post - [SOLVED] WE Scar Open Bolt Nozzle breaking, looking for input. (seems like a magazine shimming issue?)

XOIIO · January 10th, 2018, 19:34

Hey all, so I was hoping I could get lucky with my newly purchased open bolt scar, however it looks like I got stuck with the loading nozzle breaking issue as well. Don't get me wrong, I was expecting that it could come with some quirks, when it does fire properly it's freaking awesome and sounds great, I just haven't seen a thread that was that in depth in regards to the loading nozzle issue, or that wasn't a quick fix. This could be due to me using the repaired nozzle however, but it should be pretty darn strong with jb weld.

I'm also using .20g bioval bb's, maybe they aren't dense enough to withstand full auto fire?

All of my tests were with a max of 15 bb's loaded, usually much less, so I wasn't pushing the magazine up to it's fully capacity (I wanted to break it in first)

Basically, it worked fine for semi, and a couple short rounds of full auto, then it double fed, jamming one bb in the spot where the loading finger is supposed to fit, cracking it and pushing the hop up assembly apart a little bit, breaking the loading finger).

I repaired the nozzle with CA glue, and it worked a couple rounds then broke, I had just wanted to see if it would break in the same fashion.

So, next time around, I used some JB weld plastic epoxy, the quick set stuff, and I shimmed one magazine with some fairly thin washers, they are m4 ones as I couldn't find any smaller ones at that store, they won't be my long term solution.

I slowly fed bb's in manually, popping them out of the hop-up with some tweezers, and it fed them through and felt much smoother than the non shimmed magazine, worked fine on semi for a bit but then broke, so I cleaned off the jb weld and went for the classic much stronger stuff, and let it sit for about 15 hours (Should have gone longer but I was impatient lol).

Anyhow, fired about 10 shots semi auto with the bolt locking back one time even though the mag wasn't empty, but aside from that no issue. Loaded four to test full auto, all good there too, so I loaded in 15 rounds, fired two or three semi, then switch to full auto and I got two shots out before the nozzle broke again and the bb got jammed into the spot where the loading finger is supposed to sit again, being cracked.

The gun is virtually new as are the magazines from what I can tell, the spring feels nice and stuff, so it should be feeding them in quickly, though the issue is only cropping up when I do try to shoot full auto.

I have a couple more loading nozzles on the way as well as an npas kit to be field legal, and the latest breakage could be because I didn't let the jb weld set for a full 24 hours, but I am hoping to fix this issue before putting a replacement $27 nozzle in, as it would just be a waste to have it break right away.

I'm thinking I'm on the right path shimming the magazine feed lips, possibly I need to lift them up a bit higher, I have also seen in other topics feed issues that required gluing some plastic in the mag well to make the magazines sit a little further forward and with less wobble, but I didn't see the nozzle breaking issue in relation to this.

Someone on reddit also mentioned it could be the hopup assembly being out of alignment but I took the gun down to that level, and it's nice and solid, I'm thinking perhaps the screw holding the hopup together could be tightened a bit, and that might help with the bb getting forced into the loading nozzle spot, but using gentle leverage I'm not able to force it wide with any ease like the bb does, though it is very slight (picture of this and the end of the post).

I have to get a smaller allen key to get the hopup unit out, but I'm just hoping that I could get some input from someone else who has dealt with this to see if I'm on the right path, or if I may have missed something along the way.

The gun was purchased at some point last year, so it should be one of the newer produced scar 17's.

Here's the bb jammed in, and you can see how it slightly spread the hopup unit apart at the top. On the bb itself I can see what looks like an indentation from the loading finger so the jb weld was cured quite well, it just seems like the bb wasn't sitting high enough.

If anyone has pictures of their shimmed magazines vs unshimmed so I can see how much you lifted the feed lips that would be tremendously helpful.

Also another side note, I was impressed to find spring loaded captive screws, that's a nice quality touch, though they are retained with o rings, so if you have a particularly old gun they could crack and send the screws flying.

Edit, mostly as a spot for me to find this again later on, I did find this thread where the last post mentions that the open bolt nozzles can be slightly too long and need to be shaved down, I don't think that's my issue, but putting it here so I can come back to it. http://www.airsoftforum.com/board/to...amming-issues/

January 10th, 2018, 19:34	#1
XOIIO Trader rating Join Date: Mar 2016 Location: Saskatoon, sk	[SOLVED] WE Scar Open Bolt Nozzle breaking, looking for input. (seems like a magazine shimming issue?) Hey all, so I was hoping I could get lucky with my newly purchased open bolt scar, however it looks like I got stuck with the loading nozzle breaking issue as well. Don't get me wrong, I was expecting that it could come with some quirks, when it does fire properly it's freaking awesome and sounds great, I just haven't seen a thread that was that in depth in regards to the loading nozzle issue, or that wasn't a quick fix. This could be due to me using the repaired nozzle however, but it should be pretty darn strong with jb weld. I'm also using .20g bioval bb's, maybe they aren't dense enough to withstand full auto fire? All of my tests were with a max of 15 bb's loaded, usually much less, so I wasn't pushing the magazine up to it's fully capacity (I wanted to break it in first) Basically, it worked fine for semi, and a couple short rounds of full auto, then it double fed, jamming one bb in the spot where the loading finger is supposed to fit, cracking it and pushing the hop up assembly apart a little bit, breaking the loading finger). I repaired the nozzle with CA glue, and it worked a couple rounds then broke, I had just wanted to see if it would break in the same fashion. So, next time around, I used some JB weld plastic epoxy, the quick set stuff, and I shimmed one magazine with some fairly thin washers, they are m4 ones as I couldn't find any smaller ones at that store, they won't be my long term solution. I slowly fed bb's in manually, popping them out of the hop-up with some tweezers, and it fed them through and felt much smoother than the non shimmed magazine, worked fine on semi for a bit but then broke, so I cleaned off the jb weld and went for the classic much stronger stuff, and let it sit for about 15 hours (Should have gone longer but I was impatient lol). Anyhow, fired about 10 shots semi auto with the bolt locking back one time even though the mag wasn't empty, but aside from that no issue. Loaded four to test full auto, all good there too, so I loaded in 15 rounds, fired two or three semi, then switch to full auto and I got two shots out before the nozzle broke again and the bb got jammed into the spot where the loading finger is supposed to sit again, being cracked. The gun is virtually new as are the magazines from what I can tell, the spring feels nice and stuff, so it should be feeding them in quickly, though the issue is only cropping up when I do try to shoot full auto. I have a couple more loading nozzles on the way as well as an npas kit to be field legal, and the latest breakage could be because I didn't let the jb weld set for a full 24 hours, but I am hoping to fix this issue before putting a replacement $27 nozzle in, as it would just be a waste to have it break right away. I'm thinking I'm on the right path shimming the magazine feed lips, possibly I need to lift them up a bit higher, I have also seen in other topics feed issues that required gluing some plastic in the mag well to make the magazines sit a little further forward and with less wobble, but I didn't see the nozzle breaking issue in relation to this. Someone on reddit also mentioned it could be the hopup assembly being out of alignment but I took the gun down to that level, and it's nice and solid, I'm thinking perhaps the screw holding the hopup together could be tightened a bit, and that might help with the bb getting forced into the loading nozzle spot, but using gentle leverage I'm not able to force it wide with any ease like the bb does, though it is very slight (picture of this and the end of the post). I have to get a smaller allen key to get the hopup unit out, but I'm just hoping that I could get some input from someone else who has dealt with this to see if I'm on the right path, or if I may have missed something along the way. The gun was purchased at some point last year, so it should be one of the newer produced scar 17's. Here's the bb jammed in, and you can see how it slightly spread the hopup unit apart at the top. On the bb itself I can see what looks like an indentation from the loading finger so the jb weld was cured quite well, it just seems like the bb wasn't sitting high enough. If anyone has pictures of their shimmed magazines vs unshimmed so I can see how much you lifted the feed lips that would be tremendously helpful. Also another side note, I was impressed to find spring loaded captive screws, that's a nice quality touch, though they are retained with o rings, so if you have a particularly old gun they could crack and send the screws flying. Edit, mostly as a spot for me to find this again later on, I did find this thread where the last post mentions that the open bolt nozzles can be slightly too long and need to be shaved down, I don't think that's my issue, but putting it here so I can come back to it. http://www.airsoftforum.com/board/to...amming-issues/ Last edited by XOIIO; January 11th, 2018 at 22:28..