Did you actually read the link?
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Short barrel 5.56? H2...
Bear in mind that the CQB stock is shorter than a standard buffer tube and you will need Maxim's proprietary SCS...
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seems as though you have an issue with me... so yes, I did read it.... but did you read this?? seems as though they give you the choice of theirs or JP, but my question stands... they don't specifiy