Sig Sauer MCX Rattler .300 Blackout 5.5" Upper AR Conversion

Sig Sauer MCX Rattler .300 Blackout complete upper receiver with AR conversion kit.  This Sig MCX Rattler upper has a 5.5" PDW barrel and a free floating M-LOK handguard to make it the most compact, agile upper receiver available.  This kit comes with the complete MCX upper receiver, adapters to convert a standard Mil-Spec AR15 lower receiver so it's functional with the upper, and Sig's Match Duo 2 stage trigger, everything needs to remove your current AR rifle upper and upgrade to the MCX easily.

Sig MCX Rattler 5.5" Complete AR Conversion Kit in .300 Blackout Features: