Shotguns: Light Frame- Less range, faster reload, less aim assist Heavy Frame- Slower handling, slower movement speed, more stability Fusion Rifles: Light Frame- Faster projectiles, faster reload, less impact Heavy Frame- Closer projectiles, slower charge speed, more stability Sniper Rifles: Light Frame- Faster reload, less stability, less precision damage Heavy Frame- Slower handling, less aim assist, flinch less when scoped in Sidearms: Light Frame- More handling, less reserve ammo, more aim assist Heavy Frame- More stability, slower reload, larger magazine Weapons that you find randomly come as one of the 2 archetypes, regardless of whether it is high impact or high rof. Weapons with light frames will be more likely to require helium filaments to upgrade and less likely to require relic iron. Weapons with heavy frames are the opposite, being more likely to use relic iron and less likely to use helium filaments.. You can have Banshee swap out the weapon's frame for the other variety in exchange for weapon parts, materials, and legendary marks. Thoughts?