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
0        ar6320           ar - 15 lightweight  4th generation        s - 1         a1            yes            yes         16 in             a1          1:9  short ribbed         yes            a2
1        ar6450          ar - 15 9 mm carbine  4th generation        s - 1         a1             no      removable         16 in             a1         1:10  short ribbed         yes            a1
2        ar6520  ar - 15a2 government carbine  4th generation        s - 1         a2            yes            yes         16 in             a1          1:7  short ribbed         yes            a2
3      ar6520sp  ar - 15a2 government carbine  4th generation        s - 1         a2            yes            yes         10 in             a2          1:7  short ribbed         yes            a2
4        ar6525  ar - 15a2 government carbine  4th generation        s - 1         a2            yes            yes         16 in             a2          1:9  short ribbed         yes            a2
5        ar6721    ar - 15a3 tactical carbine  4th generation        s - 1    flattop            yes            yes         16 in           hbar          1:9  short ribbed         yes            a2
6      ar6721sp    ar - 15a3 tactical carbine  4th generation        s - 1    flattop            yes            yes         10 in           hbar          1:9  short ribbed         yes            a2

Table as JSON:
{"colt model no":{"0":"ar6320","1":"ar6450","2":"ar6520","3":"ar6520sp","4":"ar6525","5":"ar6721","6":"ar6721sp"},"name":{"0":"ar - 15 lightweight","1":"ar - 15 9 mm carbine","2":"ar - 15a2 government carbine","3":"ar - 15a2 government carbine","4":"ar - 15a2 government carbine","5":"ar - 15a3 tactical carbine","6":"ar - 15a3 tactical carbine"},"stock":{"0":"4th generation","1":"4th generation","2":"4th generation","3":"4th generation","4":"4th generation","5":"4th generation","6":"4th generation"},"fire control":{"0":"s - 1","1":"s - 1","2":"s - 1","3":"s - 1","4":"s - 1","5":"s - 1","6":"s - 1"},"rear sight":{"0":"a1","1":"a1","2":"a2","3":"a2","4":"a2","5":"flattop","6":"flattop"},"forward assist":{"0":"yes","1":"no","2":"yes","3":"yes","4":"yes","5":"yes","6":"yes"},"case deflector":{"0":"yes","1":"removable","2":"yes","3":"yes","4":"yes","5":"yes","6":"yes"},"barrel length":{"0":"16 in","1":"16 in","2":"16 in","3":"10 in","4":"16 in","5":"16 in","6":"10 in"},"barrel profile":{"0":"a1","1":"a1","2":"a1","3":"a2","4":"a2","5":"hbar","6":"hbar"},"barrel twist":{"0":"1:9","1":"1:10","2":"1:7","3":"1:7","4":"1:9","5":"1:9","6":"1:9"},"hand guards":{"0":"short ribbed","1":"short ribbed","2":"short ribbed","3":"short ribbed","4":"short ribbed","5":"short ribbed","6":"short ribbed"},"bayonet lug":{"0":"yes","1":"yes","2":"yes","3":"yes","4":"yes","5":"yes","6":"yes"},"muzzle device":{"0":"a2","1":"a1","2":"a2","3":"a2","4":"a2","5":"a2","6":"a2"}}