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What is the MP5 was never adopted, and instead the vented barrel and telescoping silencer used by the SD model was instead developed for the AR15? Broad River Tactical thought it would be fun to follow this line of thought, and builds an MP5SD style barrel and handguard system for the AR and I think it's a very fun and very cool concept.

This example uses the CMMG rotarydelayed blowback action, and EndoMag 9mm magazines in regular 5.56mm Pmag bodies. That means the whole system works with a standard AR lower, instead of needing a dedicated pistolmagazine lower. The silencer is a clone of the H&K SD type made by HiTec Arms, and it is a fantastically quiet combination!

Disclosure: Broad River Tactical send me the upper for free, and I put it on an SBR lower I already had. I bought the silencer. I have no other relationship with BRT or HiTec Arms.

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