Home AR-15 Sig Sauer Rattler Upper Receiver Conversion Kit

Sig Sauer Rattler Upper Receiver Conversion Kit

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Unboxing and install of my Sig Sauer Rattler 300BLK Upper Receiver Conversion Kit for AR15 lowers. Thanks for watching!

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17 COMMENTS

  1. Nice build. I have been running 300 blackout exclusively for 3 years now. My favorite build is a 9.5" voodoo barrel with a 9.5" twist built up by black rifle arms into a piston operated upper that will drill 110's at 100 yards. It's on a pistol lower can't sbr where I live. Sight is a sig sauer 4S. Magpul MS4 sling. With a tactical light. I also have a 16" running a nightforce scope along with 2 other weapons another piston and a direct impingement.

  2. Nice video! Will the supplied trigger work with a “standard” upper receiver? For example if you want to have iterchangeability and use the same lower but with the a direct impigement upper and the sig puston driven upper?

  3. You can run a trigger other than the SIG duo and it will run fine, but you’re going to break the hammer eventually. Somewhere between 1500-2000 rounds in, I broke an SSA-E hammer.

  4. Have you heard anything about hammers being broken on the MCX when the upper is utilized with an AR lower with an AR trigger? I've heard that is the case with the MPX but I haven't seen any confirmed cases with the MCX. It was my understanding that the NSW kits didn't include a trigger, but rather included the Geiselle firing pin block which allowed them to use SSF triggers with the upper.

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