From a total of 68,897,725 kills with 31,288,312 headshots

Rank	Weapon	Modifier	Kills	%	Ratio	Headshots	%	Ratio	HS:K
1		1.00	26,206,589	38.04%		4,426,604	14.15%		0.17
2		1.20	12,091,110	17.55%		8,564,127	27.37%		0.71
3		1.00	8,427,940	12.23%		5,902,973	18.87%		0.70
4		1.00	6,749,444	9.80%		4,605,435	14.72%		0.68
5		1.20	4,266,877	6.19%		2,066,594	6.61%		0.48
6		1.50	1,162,424	1.69%		732,669	2.34%		0.63
7		1.40	1,157,205	1.68%		784,403	2.51%		0.68
8		1.20	1,077,291	1.56%		552,190	1.76%		0.51
9		2.00	920,714	1.34%		13	0.00%		0.00
10		1.00	734,591	1.07%		549,204	1.76%		0.75
11		1.80	712,198	1.03%		0	0.00%		0.00
12		1.20	694,970	1.01%		338,890	1.08%		0.49
13		1.00	571,062	0.83%		412,179	1.32%		0.72
14		1.00	568,517	0.83%		368,972	1.18%		0.65
15		1.10	538,318	0.78%		460,692	1.47%		0.86
16		1.40	493,927	0.72%		323,223	1.03%		0.65
17		1.10	448,210	0.65%		268,430	0.86%		0.60
18		1.50	407,494	0.59%		230,683	0.74%		0.57
19		1.40	359,959	0.52%		264,311	0.84%		0.73
20		1.10	304,465	0.44%		98,103	0.31%		0.32
21		0.80	250,423	0.36%		63,376	0.20%		0.25
22		1.20	239,240	0.35%		77,131	0.25%		0.32
23		0.80	219,963	0.32%		50,799	0.16%		0.23
24		1.20	121,352	0.18%		48,870	0.16%		0.40
25		1.50	108,208	0.16%		61,588	0.20%		0.57
26		1.50	65,206	0.09%		36,853	0.12%		0.57
27		5.00	26	0.00%		0	0.00%		0.00
28		5.00	2	0.00%		0	0.00%		0.00