Guys... I just picked up a S & W M&P Sport .556...Couldnt resist the price....
My question is if anyone has had experience with the take down pins...I tried to seperate the upper
just to open it up..and IT WAS STIFF...I needed a punch and a mallet to get it out and tried to put back in and have been unable to do so far...Is there just a break in period or is it not machined to MIL SPEC ? Does anyone have any thoughts ?????
Thanks