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SIG SAUER MCX/MPX Side-Folding M4 Style Stock Black - All NFA Rules Apply STKXFOLDM4BLK
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Rob's Review of SIG SAUER MCX/MPX Side-Folding M4 Style Stock Black - All NFA Rules Apply STKXFOLDM4BLK

The stock mounts firm to the rail and is smooth transitioning between folded and unfolded.
Pros:
  • great max extension
  • check weld placement
  • folding lock mechanism
Cons:
  • None as of yet
Best Used for:
  • Piston driven, supressed or slick side ARs
Would Recommend: Yes
Was it helpful to you? Yes | No
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Last updated 2025-11-12 UTC.