| Loop Size | for Keymod Handguard | for M-Lok Handguard | ||
| Electrophoresis | Phosphating | Electrophoresis | Phosphating | |
| 1" | SS50SA | SS50SAM | SS51SA | SS51SAM |
| 1-1/4" | SS50SB | SS50SBM | SS51SB | SS51SBM |
| 1-1/2" | SS50SC | SS50SCM | SS51SC | SS51SCM |
| 1-13/20" | SS50SD | SS50SDM | SS51SD | SS51SDM |
