I have recently picked up Shadowrun 5 and I am deep into chargen. Lately I have particularly looked at Cyberlimb and how they fit on runners and I could use an outside opinion.
Cyberlimbs
The first thing I have noticed about Cyberlimbs is that they are really not worth it for fighting oriented character. I know, the iconic Street Samurai is always represented with his double Cyberarms, but in practice it is really a waste of resources. For slighly cheaper than your two Cyberarms customized to Agility 6 (the bare minimum imo) you can get Muscle Replacement (Rating 2) which will increase your limits and also count for the rest of your body.
So when Cyberlimbs are useful? Two situations : For the Capacity, it is almost always cheaper in Essence to get a Cyberlimbs and fit it with Toys than to put them in the Flesh directly. The second is to give some fighting power to non-combat character (Decker, Face, Infiltration, Driver...).
Let's look further at the latter with an example :
Sparkle, everyone's favorite elf face, just got out of a meet with Johnson, as he gets back to his team he is attacked by a feral dog. Thanksfully he has a shiny new Colt Government 2066 ready in his holster and has time for a couple of shots before the dog gets in melee. Sparkle hasn't hit the gym much lately and will have to fight with a measly 2 STR and AGI, he has a good training in Pistols (6) so he will throw 8 dice against the dog REA + INT so 8 dice too. Basically Sparkle will flip a coin to see if he hits, not the best situation. He could use a Semi-Automatic Burst to give a -2 Defense Pool but due to his low Strength he will immediatly get a -1 Dice himself and it will be even worst with the next shot.
Now if we look at this from chargen getting from 2 AGI to 4 would cost 35 Karma, on the other hand getting a Synthetic Full Arm (he is a face so he might not want an obvious one) with 7 Agility and 4 Strength (just enough for an extra RC) cost 45 000¥ or 23 Karma. So it is a really viable solution if you can afford to spare an Essence point. The downside is that if he wants to use 2 handed weapons (such as an assault rifle) he would have to get the average between his two arms which will still gives a +3 AGI and +1 STR compared to his base stats.
So, from your experience have you ever seen a combat character using Cyberlimbs efficiently (i.e. while Muscle Replacement wouldn't have been better)?
When and why did you install a Cyberlimb on your character?
Have you ever installed a Cybertorso/Cyberskull for anything other than fluff?
Cyber Implant Weapons
Now for Cyber Implant Weapons, first I noticed that they can be installed directly into the Flesh (yuck). For a Holdout or a Light Pistol I can see it (still yuck), maybe even a Heavy Pistols in a strong Ork/Troll arm, but SMG and Shotgun in the Flesh? I can assure you that after a couple of use you will need a Cyberarms anyway chummer.
My first question is about concealment, the core rulebook mention p.458 : For extra concealment, cyberguns are built from mostly non-metallic compounds, and any metallic parts are incorporated into the (cyber) arm’s structure. But he does not give any value, how would you deal with that? A bonus equivalent to a Concealed Holster maybe? What if you have Synthetic Cyberlimbs? An Obvious Cyberlimbs will most likely be searched for Cyberguns but a Synthetic not so much. Guess it's all up to the GM but how would you do it yourself? I also doubt that a Shotgun in the Flesh has much Concealment bonus.
Second question is how would you rule the use of a Implanted Shotgun/SMG? Normally these weapon should use both arms to fire, which limit their interest to single Cyberarm character but if integrated into a Cyberarm I think you might be able to fire with only one. At least for the SMG, but for the Shotgun, do you think someone would be able to fire an integrated Shotgun without using the other arm? It would give an extra interest to invest into an integrated one then since Shotgun are pretty versatile weapons and combined with the fact that it is hidden into the arm it becomes a really powerful choice since it removes a big penalty from Shotgun : Being big and obvious.