Questions for AR guys

As long as there's no play between the lower and the upper, your lower has little effect on the accuracy of the rifle.

The trigger upgrade is a huge plus but be aware that a sensitive trigger has its pros and cons. In my case I put a Rock River 2 stage in one AR and a JP in the other. Both rifles' accuracy was improved. But, a friend of mine who wasn't used to the sensitivity bump fired a few times in an emberassing situation at the range.

You could also think about an upper in different calibers for longer range like a 6.5 Grendal.
 
ie heard the polymer lower are all rightmainly you just need to make sure it mates your upper tightly with little or no wiggle i allways add an accuwedge.i just finished a 20 inch 1-9 upper for a buddy with out a free float handguard and the gun hits 1moa at 300 yards with custom loads 55gr. my advice is buy qualit parts and a good scope like the nikon or leupold and youll have a fun accurate rifle
100_2084.jpg
 
ie heard the polymer lower are all rightmainly you just need to make sure it mates your upper tightly with little or no wiggle i allways add an accuwedge.i just finished a 20 inch 1-9 upper for a buddy with out a free float handguard and the gun hits 1moa at 300 yards with custom loads 55gr. my advice is buy qualit parts and a good scope like the nikon or leupold and youll have a fun accurate rifle
100_2084.jpg

nice setup. Yea there is no play with the upper and lower attached.
 
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