You really don't have enough armor to be safely tanking; long and full bursts will still hurt a lot. I recommend that you drop the SWAT armor, and take a Form Fitting Body Armor and some or all of the Securetech PPPS equipment; look into modding your armor as well, Chemical Protection and Nonconductivity are particularly useful. Your "May not drink coffee" geas seems a bit weak to me (I wouldn't approve it, as a GM), but if your GM approves I suppose it's fine. I would probably trade wall running for something more useful, unless you are taking it for flavour. You may want to mod and accessorize your gun. I recommend a Foregrip (accessory), Sling (slotless mod), Heavy Barrel (3 slot mod), Gas-Vent 3 system (2 slot mod), and possibly a Barrel Reduction (1 slot mod). Don't forget to buy a Sound Suppressor (accessory) for it, and remember that you have to disengage your Gas Vents to use your suppressor. You might want to trade out your Improved Reflexes power of Synaptic Boosters, as well (4 Magic for 4 passes, versus 1 Magic for 3).
Not sure, what you're talking about, BigGuns. An adept that forgoes augmentations doesn't gain karma, initiation, or magic any faster, so it's not as though they catch up in the long run; they just sacrifice a substantial amount of power. Unaugmented adepts really need some house rules (initiation->power point, for example) to be able to stand up to equal karma street sams. Flavour is all well and good, but your fellow players are going to be annoyed at you if your character can't do his job effectively (by the standards of the party), and most players are going to be bored playing such a subpar character. Besides, if your character isn't pulling his weight, why are the other PCs splitting the pay with him?