2cants
Member
The M&P-10 is sensitive to any external pressure placed on the barrel from resting the non-free float handguard on something. Initial testing with my Big Smith shows a reduction of groups from 2-4 moa to 1-2 moa by replacing the factory handguards with a Lancer 5 carbon fiber free float handguard.
Sweet Mistolf, this is my evaluation as well for the BIG variations in accuracy. The MP10 is VERY sensitive to pressure changes on holding the barrel (fore end).
Too bad I can get a free float out of USA (as it seems everyone outside USA cannot be trusted).