Upgradeable Power Armor Example

Idea I've had for a while: equipment items with modular or upgradeable functionality. Example using the oft-requested power armor systems.

BASE ITEM: Lockheed HULC (Human Universal Load Carrier). +Strength, +Load Limit, -Sneak, -Agility

POSSIBLE UPGRADES:
Enhanced Servos: using high-strength actuators (possibly SCP-derived?), lift capacity of the HULC system is enhanced. +Strength and +Load Limit, melee attacks scale damage as a 3-load weapon.

Advanced Neural Interface: agent is trained in neurofeedback techniques, basic HULC system is fitted with an EEG rig and suitable computers to interpret this data. Reduces or removes lag inherent in exoskeleton function, returning agent's reaction times to normal. Removes Agility debuff.

Ballistic Plating: agent is provided with a heavy full-body armor package consisting of Level IV+ trauma plates and aramid-weave Level IIIB covers for the arms and legs, as well as a comparable helmet. Weight would be prohibitive for operation without power assistance, but with HULC is no more restrictive than standard Interceptor gear. +Pdef, adds to load. (See http://static2.wikia.nocookie.net/__cb20091203050943/stalker/images/0/0d/Exo_Duty_Front.jpg)

Hydraulic Recoil Buffer or Gyro-Stabilized Weapon Supports: buffer unit fits over user's firing shoulder and redirects recoil force into exoskeleton frame, away from operator. Stabilizer support system uses gyroscope systems (similar to a Steadicam unit) to remove vibrations and movement from outside sources (breathing, recoil, etc...). +Ranged.

Expanded Sensor Suite: enhanced carrying capacity allows agent to bring a variety of scanning equipment on operations. Options include CBRN suite, short-range millimetre-band radar, advanced optical equipment, etc. Provides buffs to relevant stats, adds load (not a great one, would probably be cut if this went anywhere).

Semi-Hardened Hazardous Environment Suit: combines MOPP4/BSL-4 protection against chemical and biological hazards with Level II ballistic protection to allow operations in a hot environment with less risk of suit leaks. Includes closed-circuit rebreather instead of simple gas mask, possibly with a hard helmet. Provides protection against contact-based and atmospheric hazards like poisons and low oxygen levels.

CONFIGURATIONS (IDEAS):

Close Quarters Package: combines Advanced Neural Interface with a set of enhancements for close-in fighting. Includes agent's choice of weapon system (melee or ranged). Not compatible with upgraded armor.

Breaching/Assault Package: the ultimate point man system. Enhanced armor, plus a set of armaments suited for heavy assault roles. Possibilities include pneumatic/hydraulic tools, some form of heavy shotgun (belt-fed 4" supermag?), grenade launchers, maybe flamethrower.

Fire Support Kit: Ballistic Plating and Hydraulic Buffers, paired with a suitable heavy weapon such as a modified autocannon or heavy machine gun.