From a total of 243 kills with 143 headshots

Rank	Weapon	Modifier	Kills	%	Ratio	Headshots	%	Ratio	HS:K
1		1.00	137	56.38%		82	57.34%		0.60
2		1.00	47	19.34%		21	14.69%		0.45
3		1.20	34	13.99%		27	18.88%		0.79
4		1.00	8	3.29%		3	2.10%		0.38
5		1.40	4	1.65%		3	2.10%		0.75
6		2.00	3	1.23%		0	0.00%		0.00
7		1.20	3	1.23%		3	2.10%		1.00
8		1.10	3	1.23%		1	0.70%		0.33
9		1.40	2	0.82%		1	0.70%		0.50
10		1.10	1	0.41%		1	0.70%		1.00
11		1.20	1	0.41%		1	0.70%		1.00