AR-15 variants Numbered Colt military models Numbered Colt military models

| Colt_model_no_ | Name_ | Stock | Fire_control | Rear_sight | Forward_assist | Case_deflector | Barrel_length | Barrel_profile | Barrel_twist | Hand_guards | Bayonet_Lug | Muzzle_device |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 720 | XM4 Carbine | 3rd Generation | S-1-3 | A2 | Yes | Yes | 14.5 in. | M4 | 1:7 | Short Ribbed | Yes | A2 |
| 723 | M16A2 carbine | 3rd Generation | S-1-F | A1 | Yes | Yes | 14.5 in. | A1 | 1:7 | Short Ribbed | Yes | A1 |
| 725A | M16A2 carbine | 3rd Generation | S-1-F | A1 | Yes | Yes | 14.5 in. | A1 | 1:7 | Short Ribbed | Yes | A2 |
| 725B | M16A2 carbine | 3rd Generation | S-1-F | A1 | Yes | Yes | 14.5 in. | A2 | 1:7 | Short Ribbed | Yes | A2 |
| 726 | M16A2 carbine | 3rd Generation | S-1-F | A1 | Yes | Yes | 14.5 in. | A1 | 1:7 | Short Ribbed | Yes | A1 |
| 727 | M16A2 carbine | 3rd Generation | S-1-F | A2 | Yes | Yes | 14.5 in. | M4 | 1:7 | Short Ribbed | Yes | A2 |