This seems like an underbar to me, really. Why not just say that advanced warriors often have extra weapons built-in? We can include a typical stat block if you like, but I'd honestly just include the variant Integral Weapons text.
I think including the stats would be more useful, although I'd be fine putting them into a compressed format such as the "Dungeon magazine compact block" type, e.g.:
Heavy Warrior Droid (Large Construct;
Hit Dice: 8d10+30 (74 hp);
Init: +2;
Speed: 30 ft. (6 squares);
AC: 21 (-1 size, +2 Dex, +10 natural), touch 11, flat-footed 19;
Base Attack/Grapple: +8/+19;
Attack: high frequency sword +15 melee (3d6+12/17-20) or concussion rifle +13 ranged (3d10 + special) or laser pistol +12 ranged (2d8 fire) or slam +14 melee (1d8+7);
Full Attack: high frequency sword +15/+10 melee (3d6+12/17-20); or concussion rifle +13/+8 ranged (3d10 + special); or laser pistol +12/+7 ranged (3d8); or 2 slams +14 melee (1d8+7);
Space/Reach: 10 ft./10 ft.;
Special Attacks: Feat sockets, integral weapons, martial programming;
Special Qualities: Advanced data slots, construct traits, damage reduction 5/adamantine, radarsight, radiospeech, robot traits;
Saves: Fort +2, Ref +4, Will +2;
Abilities: Str 24, Dex 14, Con —, Int 11, Wis 11, Cha 10;
CR: 7)
Skills & Feats: Listen +11, Spot +11, plus crystal card skills* (typically Climb +11, Jump +11, Search* +8);
Feats: Combat Reflexes, Improved Critical (high frequency sword)(B), Point Blank Shot, Power Attack, Rapid Shot (B), Weapon Focus (concussion rifle)(B), Weapon Focus (high frequency sword)(B), Weapon Specialization (high frequency sword)(B)
*Many Warrior Droids substitute another Int-based skill for their crystal card's Search skill, such as Craft, Disable Device or Knowledge.
Integral Weapons (Ex): Warrior droid can use weapons and wear armor like a standard character, but most also have built-in weapon systems. Integral weapons are powered by the droid's internal energy plant, so they will not run out of power as long as the warrior droid continues functioning.
A heavy warrior droid has a high-frequency sword built into one arm, a concussion rifle in its other arm and a laser pistol in its head. Targeting sensors give the heavy warrior droid a +3 racial bonus to its rifle and laser's attack rolls. The droid does not provoke attacks of opportunity when it attacks with its integrated laser, despite it being a ranged weapon.