I"ve owned an H&K 91, hence 93/43 clone in semi auto for years.
The most critical part for bolt gap is the locking rollers being larger than spec'd and forces the locking mech into a rearward position thus creating bolt gap.
If the gun is new, It shouldn't be a problem, but the wear on those points is going to create a non-flush set of rollers. You should replace them and or the bolt about 5,000 rounds, even in the H&K.
I'm not crazy about this particular rifle, although I'd never sell or trade mine in.
HTH.