The G11 is a perfect example of why comparing most modern day weapons to those of 2072 Shadowrun is fairly pointless when all is said and done. Our tech is simply not up to par when compared to SR tech. Can real life examples of technology provide guidelines on how SR4 and SR5 tech might work; yes. Are such examples useful as direct analogies; no. There's too much unac
Bottom line, extreme examples from long to short range based on anecdotal evidence from my own service as an infantry marksman;
After the first year of my service (one year of training in the Shadowrun equivalent of Automatics and Longarms) I could reliably achieve
1. a .5 MOA* group at 1000 meters from a prone, braced position, using a Sako TRG-42 chambered for .338 Sierra MatchKing ammunition with a custom 1-10" twist, 710mm long barrel
* at 100m 1 MOA is a circle with a diameter of 1.047" or 2.908cm. At 1000 meters a.5 MOA group means placing 5 rounds inside of a circle with a diameter of 5.235" or 14.54cm
2. 90% or higher hit rate at 300 meters firing 7.62 x 51mm ammunition from a prone or kneeling, braced position using a bone stock semi/automatic H&K G3 (my rifle was made in 1965, which just goes to show that if you take care of something that's well made it'll last you a long time indeed...)
3. an approximate 40% hit rate on human sized targets at 200 meters firing short, manually controlled bursts of 7.62 x 51mm ammunition from a prone, braced position using a fully-automatic belt-fed Rheinmetall MG-3
4. a stunning 1% hit rate on a human sized target at 50 meters from a standing, unbraced position (in other words, holding the pistol grip in one hand and the bipod in the other) firing a full burst of 200 rounds from the same MG-3
5. an approximate 80% hit rate on moving human sized targets at anywhere from 10 to 30 meters while on the move firing 3-round bursts of 9mm rounds using a stock H&K MP5
The same course with our standard H&K G3 assault rifle resulted in much less accurate fire due to the much higher recoil of the 7.62mm round compared to the nearly insignificant recoil of the 9mm round.
Make of that what you will.