From a total of 625,987 kills with 141,758 headshots

Rank	Weapon	Modifier	Kills	%	Ratio	Headshots	%	Ratio	HS:K
1		1.00	217,767	34.79%		54,449	38.41%		0.25
2		1.00	164,080	26.21%		41,831	29.51%		0.25
3		1.40	80,249	12.82%		5,415	3.82%		0.07
4		1.50	56,960	9.10%		15,409	10.87%		0.27
5		1.00	20,419	3.26%		7,659	5.40%		0.38
6		1.50	18,019	2.88%		4,936	3.48%		0.27
7		1.50	10,184	1.63%		2,576	1.82%		0.25
8		1.25	9,201	1.47%		2,102	1.48%		0.23
9		1.80	8,987	1.44%		0	0.00%		0.00
10		1.00	8,155	1.30%		2,154	1.52%		0.26
11		1.60	5,626	0.90%		933	0.66%		0.17
12		1.80	5,400	0.86%		377	0.27%		0.07
13		1.00	4,116	0.66%		809	0.57%		0.20
14		1.00	4,106	0.66%		735	0.52%		0.18
15		0.80	2,388	0.38%		419	0.30%		0.18
16		1.40	1,889	0.30%		188	0.13%		0.10
17		1.40	1,678	0.27%		366	0.26%		0.22
18		1.25	1,449	0.23%		371	0.26%		0.26
19		1.70	1,236	0.20%		323	0.23%		0.26
20		1.40	1,220	0.19%		107	0.08%		0.09
21		1.25	893	0.14%		146	0.10%		0.16
22		1.25	434	0.07%		115	0.08%		0.26
23		1.25	421	0.07%		143	0.10%		0.34
24		1.50	397	0.06%		66	0.05%		0.17
25		1.50	395	0.06%		50	0.04%		0.13
26		1.50	318	0.05%		79	0.06%		0.25