Give you a statement and table with its title in Markdown format, please determine whether the statement is supported or refuted by, or is unrelated to the table. It'a binary classification problem, you should choose the answer between supported and refuted. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| colt model no | diemaco model | stock | fire control | rear sight | forward assist | barrel length | barrel profile | barrel twist | hand guards | bayonet lug | muzzle device |
| 715 | c7 | a2 | s - 1 - f | a1 | yes | 20 in | a2 | 1:7 | ribbed | yes | a2 |
| n / a | c7ft | a2 | s - 1 - f | weaver | yes | 20 in | a2 | 1:7 | ribbed | yes | a2 |
| n / a | c7a2 | canadian 3rd generation | s - 1 - f | weaver | yes | 20 in | a2 | 1:7 | ribbed | yes | a2 |
| 750 | colt / diemaco lmg / lsw | a2 | s - f | a2 | yes | 20 in | hbar | 1:7 | square lmg | no | a2 |
| n / a | lsw | a2 | s - f | weaver | yes | 20 in | hbar | 1:7 | square lmg | no | a2 |
| 725 | c8 | 3rd generation | s - 1 - f | a1 | yes | 14.5 in | a1 | 1:7 | short ribbed | yes | a2 |
| n / a | c8ft | canadian 3rd generation | s - 1 - f | weaver | yes | 14.5 in | a1 | 1:7 | short ribbed | yes | a2 |
| n / a | c8fthb | canadian 3rd generation | s - 1 - f | weaver | yes | 14.5 in | a2 | 1:7 | short ribbed | yes | a2 |
| n / a | sfw | canadian 3rd generation | s - 1 - f | weaver | yes | 16 in | sfw | 1:7 | short ribbed | yes | a2 |
| n / a | c8cqb | canadian 3rd generation | s - 1 - f | weaver | yes | 10 in | a2 | 1:7 | short ribbed | yes | a2 |
Title:
ar - 15 variants
Statement:
only two ar - 15 variants have a s - f fire control
Answer:
supported