From a total of 66,300,215 kills with 30,513,878 headshots

Rank	Weapon	Modifier	Kills	%	Ratio	Headshots	%	Ratio	HS:K
1		1.00	24,758,269	37.34%		4,230,228	13.86%		0.17
2		1.20	11,645,989	17.57%		8,316,678	27.26%		0.71
3		1.00	8,317,465	12.55%		5,846,908	19.16%		0.70
4		1.00	6,587,639	9.94%		4,516,490	14.80%		0.69
5		1.20	4,032,354	6.08%		1,951,158	6.39%		0.48
6		1.50	1,147,810	1.73%		724,760	2.38%		0.63
7		1.40	1,137,845	1.72%		772,691	2.53%		0.68
8		1.20	1,069,630	1.61%		548,574	1.80%		0.51
9		2.00	893,500	1.35%		13	0.00%		0.00
10		1.00	727,473	1.10%		545,350	1.79%		0.75
11		1.80	682,104	1.03%		0	0.00%		0.00
12		1.20	679,258	1.02%		331,245	1.09%		0.49
13		1.00	565,858	0.85%		409,583	1.34%		0.72
14		1.00	564,836	0.85%		367,165	1.20%		0.65
15		1.10	528,472	0.80%		454,939	1.49%		0.86
16		1.40	485,190	0.73%		317,902	1.04%		0.66
17		1.10	441,954	0.67%		265,311	0.87%		0.60
18		1.50	401,466	0.61%		227,660	0.75%		0.57
19		1.40	355,367	0.54%		261,856	0.86%		0.74
20		1.10	301,925	0.46%		97,159	0.32%		0.32
21		0.80	241,406	0.36%		60,293	0.20%		0.25
22		1.20	230,470	0.35%		73,802	0.24%		0.32
23		0.80	213,739	0.32%		49,106	0.16%		0.23
24		1.20	119,301	0.18%		47,971	0.16%		0.40
25		1.50	106,664	0.16%		60,697	0.20%		0.57
26		1.50	64,204	0.10%		36,339	0.12%		0.57
27		5.00	25	0.00%		0	0.00%		0.00
28		5.00	2	0.00%		0	0.00%		0.00