Masterpiece Arms Gray Ops Side Rail Weights (Steel)



  • Give the perfect balance point to your MPA BA Comp/Matrix/ESR Chassis when combined with the MPA Competition Side Rails
  • Added weight Reduces recoil and adds stability
  • Added locations for hand gripping


  • Machined from 1018 cold rolled steel
  • Black Nitride finish for superior corrosion and rust resistance
  • Includes 4 weights (two weights per side)
  • Each weight has 3 built in flush cup locations (12 total per kit) for each sling and accessory attachment
  • Adds 27.4 ounces per 4 weight kit
  • BA Comp Kit Dimensions roughly 0.6 x 0.6 x 5.25”
  • Matrix/ESR/Matrix PRO Kit Dimensions roughly 0.5 x 0.6 x 6”
  • Hardware to attach to side rails included


  • Side rails for each of BA Comp, Matrix and ESR – shown in picture must be purchased separately and installed to utilize these weights.
  • Matrix/ESR side rails fit directly to the Matrix Pro Chassis.
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Additional information


BA Comp/Hybrid Chassis, Matrix/Matrix Pro/ESR Chassis