@Lonewarrior @Johny_Baba
Is this normal or am I being too picky
View attachment 198462
mom-service NG7
stamped sheet metal receiver gun, hence welds there to affix separate sections or internal bolt carrier rails etc together, it's normal
they just didn't bother to remove excess of welds by filing them off but does it matter ?
here is a better looking example of welds on stamped sheet metal receiver gun, FN FNC upper receiver
and it's even more ogre on FNC's bolt carrier because well, they simply welded the gas piston rod with bolt carrier on FNC

...even AK takes care by properly screwing gas piston inside extended carrier and so
(from top to bottm, bolt carriers of early production FNC, later production FNC and civilian semi-auto production FNC, you can see the cost cutting done even at basic welding of gas piston rod with the bolt carrier here as welds decreased from top to bottm)
so yeah it's common on mass manufactured stamped sheet receiver guns-some manufacturers take care in keeping aesthetic by removing excess welds while some just let it be - beside as long as it works looks are secondary on a firearm