There is no such thing as a “bad day at the range”, but some are less optimal than others. My new normal-capacity magazines for my Baby Eagle (review to be forthcoming when I get around to it) worked exactly as advertised/intended, but the Tactical Solutions SBX upper I purchased for Buy a Gun Day was a complete and total fail.
When the magazine was inserted, the bolt would not go all the way home, and when the magazine was removed, the gun would not fire.
I removed the bolt, and pushed the firing pin to the back, inserted everything back together, found it still would not close the bolt with the magazine inserted, removed the magazine, and managed to fire a single hand-loaded round. Then I tried to hand-load another round, and it would not fire. Disassemble the gun, push the firing pin to the rear, put it back together, hand-load a round, and it fired again.
Why would the bolt not want to go home with the magazine inserted, and why would the firing pin not “recover” from its forward position? I have written TacSol, but I am wondering if anyone out there has encountered something similar.