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Which BB's are best for the Mp7?


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#1 Mp7Love

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Posted 05 May 2013 - 10:55 PM

The BB's I have currently get stuck in the middle of the magazine and do not feed upwards. Only the first shot fires then the rest just stay where they were. Which BB's work best and feed smoothly with the Mp7? Thanks!

#2 General Pickle

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Posted 05 May 2013 - 11:05 PM

Clean your magazines and see if that solves the problem. I use Bioval .25g's and .30's and I've never had a single misfeed or jam.

#3 Chuck S

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Posted 06 May 2013 - 02:51 AM

No feeding problems with Elite Force biodegradable in mine.  0.25, 0.28, 0.32 all seem fine.

-- Chuck

#4 kwaispro727

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Posted 06 May 2013 - 03:38 AM

All KWA BBs, Bioval .2s, and WE .3s have all worked fine for me in my MP7.  I don't even know where I got the WE BBs from but surprisingly they're alright.

#5 ps6379

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Posted 06 May 2013 - 06:13 AM

same problem, but i found out that its the magazine. not the bb's. what i did was cleaned the magazine feed and lubed the rail with lithium grease because silicon oil tends to dry out when the magazine gets cold.

#6 akiraspeedstar

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Posted 06 May 2013 - 06:25 AM

Like ps6379 mentioned its probably your magazine being dirty or possibly having a mold defect that may need to be polished/sanded out. I don't recommend putting grease or oil in the BB track as it'll hold dirt and debris and also coat the BB with grease which will cause accuracy issues, jamming, and possible bucking swelling. Just keep the track nice and clean and verify that there are no bumps.

When I had an Mp7 I tried Goldenball, KWA/KSC Perfects, Elite Force, and even some cheaply no name brand and never had any issues with it feeding.

Edited by akiraspeedstar, 06 May 2013 - 06:29 AM.


#7 kwaispro727

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Posted 06 May 2013 - 10:06 AM

GBBs are a little more simple in general.  I've noticed they are a little less picky about BBs.

#8 Mp7Love

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Posted 06 May 2013 - 01:21 PM

Thanks guys, I cleaned it, now it feeds like new. I'm still considering getting new BB's though.

#9 General Pickle

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Posted 06 May 2013 - 03:07 PM

View Postakiraspeedstar, on 06 May 2013 - 06:25 AM, said:

Like ps6379 mentioned its probably your magazine being dirty or possibly having a mold defect that may need to be polished/sanded out. I don't recommend putting grease or oil in the BB track as it'll hold dirt and debris and also coat the BB with grease which will cause accuracy issues, jamming, and possible bucking swelling. Just keep the track nice and clean and verify that there are no bumps.

When I had an Mp7 I tried Goldenball, KWA/KSC Perfects, Elite Force, and even some cheaply no name brand and never had any issues with it feeding.
That's exactly what I was thinking. Lube in the BB's means a fast way to the 'Daaanger zoooone!' :P I had a couple MK series mags that had this issue and I simply made sure that the follower was smooth and that the loading area was smooth as well, so little filing was needed but for the most part it was just dirt and schtuff that was stuck in the mag.

As for a new brand of BB's I think that will mostly depend on whether you need bio BB's or not. If bio isn't an issue then you'll be fine with just about any quality airsoft brand. If you want bios then I really REALLY recommend Biovals, though they are a bit more expensive the performance trade off is remarkable. I used the elite force ones before and they did work... but I noticed they were getting dented and deformed from the pressure of the metal magazine pieces. It didn't cause any problems, however it was concerning to me so I stopped using them.

#10 gcw360

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Posted 06 May 2013 - 07:05 PM

View Postakiraspeedstar, on 06 May 2013 - 06:25 AM, said:

Like ps6379 mentioned its probably your magazine being dirty or possibly having a mold defect that may need to be polished/sanded out. I don't recommend putting grease or oil in the BB track as it'll hold dirt and debris and also coat the BB with grease which will cause accuracy issues, jamming, and possible bucking swelling. Just keep the track nice and clean and verify that there are no bumps.

When I had an Mp7 I tried Goldenball, KWA/KSC Perfects, Elite Force, and even some cheaply no name brand and never had any issues with it feeding.
I couldn't have said it better.




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