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LS-MP5 trigger housing StopBlock

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$20.00
LS-MP5 trigger housing StopBlock
SKU:
LS-StopBlock
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Product Overview

This is the StopBlock, made for your Super Safety equipped MP5 clone when using an LS trigger housing. 

The StopBlock prevents Safety overtravel and also works as a centering block. It protects the cam from damage caused by over-rotation of the Safety if it is struck by the SlipTrip when using a LS trigger housing. 

Compatible with LS trigger housings only. 

Printed in Polymaker PA12-CF and annealed.

INSTRUCTIONS: Before installing the Lever Stop Block into the Lee Sporting housing, first install the SS cam and lever directly into the Lever Stop Block and manually rotate the lever by hand while squeezing the sides to ensure it can pivot freely in both directions, and clear out any debris.

Reviews

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  • 5
    MP5 stop block

    Posted by Jack on May 28th 2025

    I’ve had the stop block for a few weeks but finally got the chance to install it and test it out. I installed it in a Lee lower used in a K sized MKE gun. The gun has been running fine with a GMR Super Safety and slip trip, but after reading about some SS levers breaking in Lee lowers because of over travel, I decided to try the stop block. It’s a very tight fit in the lower, and inserting the lever and barrel are both difficult because they are tight also. (Tight is good.) I took the gun to the range and it functioned fine in semi and SS mode for 100 rounds. Time will tell if this prevents any issues, but for now it works as advertised.

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