From a total of 67,138,383 kills with 30,763,691 headshots

Rank	Weapon	Modifier	Kills	%	Ratio	Headshots	%	Ratio	HS:K
1		1.00	25,223,693	37.57%		4,293,447	13.96%		0.17
2		1.20	11,790,971	17.56%		8,397,201	27.30%		0.71
3		1.00	8,352,661	12.44%		5,864,650	19.06%		0.70
4		1.00	6,642,841	9.89%		4,546,427	14.78%		0.68
5		1.20	4,107,268	6.12%		1,987,668	6.46%		0.48
6		1.50	1,151,653	1.72%		726,868	2.36%		0.63
7		1.40	1,143,957	1.70%		776,357	2.52%		0.68
8		1.20	1,071,894	1.60%		549,658	1.79%		0.51
9		2.00	902,432	1.34%		13	0.00%		0.00
10		1.00	729,758	1.09%		546,578	1.78%		0.75
11		1.80	691,902	1.03%		0	0.00%		0.00
12		1.20	685,122	1.02%		334,056	1.09%		0.49
13		1.00	567,295	0.84%		410,295	1.33%		0.72
14		1.00	565,851	0.84%		367,656	1.20%		0.65
15		1.10	531,823	0.79%		456,918	1.49%		0.86
16		1.40	488,081	0.73%		319,629	1.04%		0.65
17		1.10	443,774	0.66%		266,222	0.87%		0.60
18		1.50	403,412	0.60%		228,676	0.74%		0.57
19		1.40	356,863	0.53%		262,623	0.85%		0.74
20		1.10	302,740	0.45%		97,489	0.32%		0.32
21		0.80	244,535	0.36%		61,274	0.20%		0.25
22		1.20	232,102	0.35%		74,506	0.24%		0.32
23		0.80	216,131	0.32%		49,748	0.16%		0.23
24		1.20	119,929	0.18%		48,245	0.16%		0.40
25		1.50	107,179	0.16%		60,994	0.20%		0.57
26		1.50	64,489	0.10%		36,493	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