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Ok guys I'm just about ready to do the VSR hop mod on both of my MP5s, one thing I'm stuck on is what barrel to go for for either of them, the A3 is 210mm +- 10mm inner barrel, I'm struggling to find the correct length, let alone the correct length and cut outs.
The K is 110mm long and I think I can use an RA-tech 6.01 inner barrel but I'm not 100% sure.
Anyone got any recommendations?
Or is it worth just adapting the current inner barrels to take the VSR hop rubber?
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