From a total of 68,550,862 kills with 31,180,780 headshots

Rank	Weapon	Modifier	Kills	%	Ratio	Headshots	%	Ratio	HS:K
1		1.00	26,026,747	37.97%		4,402,126	14.12%		0.17
2		1.20	12,028,268	17.55%		8,529,259	27.35%		0.71
3		1.00	8,414,485	12.27%		5,896,310	18.91%		0.70
4		1.00	6,725,907	9.81%		4,592,879	14.73%		0.68
5		1.20	4,228,430	6.17%		2,048,231	6.57%		0.48
6		1.50	1,160,056	1.69%		731,459	2.35%		0.63
7		1.40	1,153,711	1.68%		782,367	2.51%		0.68
8		1.20	1,076,211	1.57%		551,680	1.77%		0.51
9		2.00	917,208	1.34%		13	0.00%		0.00
10		1.00	733,384	1.07%		548,544	1.76%		0.75
11		1.80	708,188	1.03%		0	0.00%		0.00
12		1.20	692,272	1.01%		337,575	1.08%		0.49
13		1.00	570,244	0.83%		411,792	1.32%		0.72
14		1.00	567,959	0.83%		368,718	1.18%		0.65
15		1.10	536,955	0.78%		459,988	1.48%		0.86
16		1.40	492,472	0.72%		322,306	1.03%		0.65
17		1.10	447,399	0.65%		268,018	0.86%		0.60
18		1.50	406,596	0.59%		230,217	0.74%		0.57
19		1.40	359,304	0.52%		263,977	0.85%		0.73
20		1.10	304,255	0.44%		98,013	0.31%		0.32
21		0.80	249,130	0.36%		62,931	0.20%		0.25
22		1.20	238,540	0.35%		76,861	0.25%		0.32
23		0.80	219,130	0.32%		50,590	0.16%		0.23
24		1.20	121,082	0.18%		48,766	0.16%		0.40
25		1.50	107,906	0.16%		61,408	0.20%		0.57
26		1.50	64,995	0.09%		36,752	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