Sig Sauer MCX AR15 Conversion Kit - 16" 5.56mm NATO

This is a new OEM Sig Sauer MCX Conversion Kit that includes an MCX upper receiver, adapters to convert the lower receiver to accept the MCX upper receiver, and a Sig Sauer two-stage trigger. The trigger installation is required to ensure proper operation of the MCX upper receiver. Using your existing trigger is not recommended and may lead to malfunction.

The MCX upper includes the necessary parts to utilize an existing AR lower receiver. The kit includes:

- The upper receiver with BCG, charging handle, 16" barrel
- Buffer tube eliminator (with 1913 back rail for a stock or brace)
- A side folding 1913 buffer tube receiver / adapter (to mount a stock or brace buffer tube)
- A two stage Sig Sauer Match Duo Trigger