| '''Original''' || Underbarrel: M203 mount (if barrel is '''DMR, Rifle, Carbine,''' or '''Commando''')<br/>Underbarrel: None (if barrel is '''Sport carbine''', '''Competition''' or '''Subcarbine''') || [[Colt AR-15A2 R6550]]<br/>[[Colt M16A1]]<br/>[[Colt M16A2]]<br/>[[Colt M16A4]]<br/>[[Colt M4]]<br/>[[Colt M4A1]]<br/>[[Colt Mark 18 Mod 0]]<br/>[[Colt XM177E2 Commando]] || '''100''' || Original handguards with no features.
|-
| '''Quad rails''' || Lights: 2x Long interface<br/>Underbarrel: Long interface || [[Alexander Arms AWS]] || '''600''' || Quad-rail handguards to attach the lights, lasers, and underbarrel accessories of your choice.
|}