From a total of 66,296,600 kills with 30,512,742 headshots

Rank	Weapon	Modifier	Kills	%	Ratio	Headshots	%	Ratio	HS:K
1		5.00	25	0.00%		0	0.00%		0.00
2		1.80	682,056	1.03%		0	0.00%		0.00
3		2.00	893,453	1.35%		13	0.00%		0.00
4		5.00	2	0.00%		0	0.00%		0.00
5		1.00	24,756,468	37.34%		4,229,996	13.86%		0.17
6		0.80	213,735	0.32%		49,105	0.16%		0.23
7		0.80	241,381	0.36%		60,286	0.20%		0.25
8		1.20	230,467	0.35%		73,801	0.24%		0.32
9		1.10	301,922	0.46%		97,157	0.32%		0.32
10		1.20	119,298	0.18%		47,970	0.16%		0.40
11		1.20	4,031,937	6.08%		1,950,955	6.39%		0.48
12		1.20	679,206	1.02%		331,223	1.09%		0.49
13		1.20	1,069,624	1.61%		548,570	1.80%		0.51
14		1.50	64,204	0.10%		36,339	0.12%		0.57
15		1.50	106,663	0.16%		60,697	0.20%		0.57
16		1.50	401,459	0.61%		227,657	0.75%		0.57
17		1.10	441,950	0.67%		265,309	0.87%		0.60
18		1.50	1,147,801	1.73%		724,757	2.38%		0.63
19		1.00	564,816	0.85%		367,158	1.20%		0.65
20		1.40	485,187	0.73%		317,899	1.04%		0.66
21		1.40	1,137,820	1.72%		772,672	2.53%		0.68
22		1.00	6,587,374	9.94%		4,516,335	14.80%		0.69
23		1.00	8,317,155	12.55%		5,846,756	19.16%		0.70
24		1.20	11,645,467	17.57%		8,316,380	27.26%		0.71
25		1.00	565,846	0.85%		409,581	1.34%		0.72
26		1.40	355,365	0.54%		261,855	0.86%		0.74
27		1.00	727,458	1.10%		545,341	1.79%		0.75
28		1.10	528,461	0.80%		454,930	1.49%		0.86