AR-15 variants AR series models AR series 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AR6721 | AR-15A3 Tactical Carbine | 4th Generation | S-1 | Flattop | Yes | Yes | 16 in. | HBAR | 1:9 | Short Ribbed | Yes | A2 |
| AR6721SP | AR-15A3 Tactical Carbine | 4th Generation | S-1 | Flattop | Yes | Yes | 10 in. | HBAR | 1:9 | Short Ribbed | Yes | A2 |