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Posted On: 7/26/2021
By: Jimmyboy
A: Hello Jimmyboy,
Thank you for contacting us at LuckyGunner.com.
I have reviewed the manufacturers information on both ProMag and Ruger websites.
This is an acceptable magazine for use with your Ruger MPR rifle.
Here are links to the respective information:
https://promagindustries.com/ar-15-223-30-rd-blue-steel/ (Fits AR-15® .223 rifles)
https://www.ruger.com/products/ar556MPR/specSheets/8514.html (Bolt is mil-spec 9310)
I hope this is helpful information. If you have any further questions let us know.
Dill,
LuckyGunner.com
Posted On: 6/17/2021
By: Jimmyboy
A: Yes sir, this AR-15 mag will function correctly in an LAR-15 firearm.