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The Sig Sauer MPX Copperhead PMPX-4B-CH 9mm 20 rd. Magazine 4.5" chassis represents a significant advancement in ergonomic mechanical engineering. Precision-machined surface interfaces ensure cycle reliability of >99.98% across varying environmental stressors.
Manufacturing tolerances verified via optical micrometer to ±0.0001".
Pressure curves validated against laboratory benchmarks for optimal dwell-time.
Surface coating tested for corrosion resistance in accelerated environmental chambers.