Weird I've run through over 50000 of the frag line with zero issues in TM and KA low caps, G&G and G&P hi caps, G&P and KA mid caps. As well as countless pistol mags.
Are you sure your mags are clean and feeding properly?
Oh and they are never In stock because everyone keeps buying them out.
You also have to keep in mind the frag line was a cheaper option for those looking for a bulk options and never meant to be compared to the double polish line of their primary BBs
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