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Due to Measure 114, Rainier Arms will prioritize order shipments to Oregon state residents.

Lee Sporting MP5 / SP5 / HK Clone Lower Housing - MP5 Shelf

Lower Receiver

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Only 5 left

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Lee Sporting MP5 / SP5 / HK Clone Lower Housing - MP5 Shelf


Furniture-less housing for MP5 trigger group.  Fits full size MP5's with shelf-style trigger group attachment. Allows user to utilize AR trigger, safety, and grip of their preference. Lightweight, ergonomic upgrade over original housing allowing for a much better trigger. Housing made from MJF PA11 Nylon. Ejector Lever and Pin machined from 4140 steel. All parts made in USA.



  • Triggers
    • Use AR triggers with full power hammer springs.
    • The MP5 bolt carrier compresses the AR style hammer slightly more than an AR bolt carrier. Many two-stage triggers like Geisseles do not have the same range of motion, and are not compatible.
    • Drop in triggers with sloped cassettes like the Rise Armament RA-240, Timney Competition, JP FC-M will fit in the housing. 
    • Drop in triggers with tall cassettes like Timney Impact and PCC, Triggertech, Rise Armament RA-434 Rave PCC Rave 140, Midwest Industries Drop in, and CMC will not fit.
    • Mil-spec, and other AR triggers that do not have a cassette will work.
  • Grips
    • The Sporting Trigger Group has a different contour than the standard AR lower.
    • A2, Magpul MOE-K, Daniel Defense, and Griffin Armament A3 pistol grips will work.
    • Any Pistol Grip with a Backstrap tang that extends higher than the Pistol Grip’s mounting surface, will not fit. Examples include Magpul MOE, B5, Wilson Combat, HK V2.
  • Safety
    • Most AR Safety levers are compatible with the Sporting Trigger Group.
    • The Housing’s Ejection Lever Pin features prevent a safety from rotating a complete 180 degrees.
    • Ambidextrous safeties with a tall indicating point may make contact with the top of the Trigger Group. 
More Information
Product Type Lower Receiver
Manufacturer Lee Sporting
Color Black
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