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Discussion Starter #1
A few pictures to show the differences between HK MR223 vs. JP Rifles CTR-02 (AR-15).

You're welcome to share my pictures on other forums.


Changed the uppers / lowers on the rifles.



Won't fit!













 

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JP hammer is narrow even compared to standard AR15 hammer. This makes it very light while maintaining proper height.
 

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Has anyone else tried this with their standard AR's? Is this a problem only between the CTR and MR?
This is MR223 - it has receiver pins relocated by purpose, to make it incompatible with AR15 upper/lower (namely with HK416 upper/lower). It only applies to this version, MR556A1 is compatible with AR15 uppers/lowers.
 

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Discussion Starter #9
252 grams vs. 335 grams.

33% more weight to move each time.






 
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