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Jay's Review of SIG SAUER Sig MCX Upper Receiver Assemebly, M-LOK
I picked up the 5" upper to set up my MCX as a Rattler. It has run flawlessly. I've run my suppressor on it without issue as well. I did switch the gas setting for subsonics when using my OSS can. Super happy with my purchase.
Pros:
- great gun
- cheaper than buying whole gun
Cons:
- still an expensive modification
Would Recommend:
Yes
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