| 0x01 | SourceMethod | Beam2SourceTargetMethod | 6 flags | PEB2STM_Default |
| 0x0031 | 0x03 | padding / unreflected |
| 0x08 | SourceName | FName | 6 flags | None |
| 0x01 | bSourceAbsolute : 1bit 0 | bool | 4 flags | false |
| 0x003D | 0x03 | padding / unreflected |
| 0x50 | Source | FRawDistributionVector | 3 flags | {MinValue=0, MaxValue=0, MinValueVec={X=0, Y=0, Z=0}, MaxVa… |
| 0x01 | bLockSource : 1bit 0 | bool | 4 flags | false |
| 0x0091 | 0x03 | padding / unreflected |
| 0x01 | SourceTangentMethod | Beam2SourceTargetTangentMethod | 6 flags | PEB2STTM_Direct |
| 0x0095 | 0x03 | padding / unreflected |
| 0x50 | SourceTangent | FRawDistributionVector | 3 flags | {MinValue=0, MaxValue=0, MinValueVec={X=0, Y=0, Z=0}, MaxVa… |
| 0x01 | bLockSourceTangent : 1bit 0 | bool | 4 flags | false |
| 0x00E9 | 0x07 | padding / unreflected |
| 0x38 | SourceStrength | FRawDistributionFloat | 3 flags | {MinValue=0, MaxValue=0, Distribution=nullptr} |
| 0x01 | bLockSourceStength : 1bit 0 | bool | 4 flags | false |
| 0x0129 | 0x07 | unreflected bytes to end of UParticleModuleBeamSource |