From a total of 67,658,202 kills with 30,911,535 headshots

Rank	Weapon	Modifier	Kills	%	Ratio	Headshots	%	Ratio	HS:K
1		1.00	25,531,716	37.74%		4,334,936	14.02%		0.17
2		1.20	11,864,864	17.54%		8,437,404	27.30%		0.71
3		1.00	8,381,155	12.39%		5,879,274	19.02%		0.70
4		1.00	6,674,039	9.86%		4,563,955	14.76%		0.68
5		1.20	4,145,587	6.13%		2,007,076	6.49%		0.48
6		1.50	1,155,020	1.71%		728,752	2.36%		0.63
7		1.40	1,146,855	1.70%		778,160	2.52%		0.68
8		1.20	1,073,771	1.59%		550,535	1.78%		0.51
9		2.00	907,029	1.34%		13	0.00%		0.00
10		1.00	731,288	1.08%		547,421	1.77%		0.75
11		1.80	697,848	1.03%		0	0.00%		0.00
12		1.20	687,239	1.02%		335,119	1.08%		0.49
13		1.00	568,501	0.84%		410,926	1.33%		0.72
14		1.00	566,724	0.84%		368,092	1.19%		0.65
15		1.10	534,172	0.79%		458,432	1.48%		0.86
16		1.40	489,419	0.72%		320,425	1.04%		0.65
17		1.10	445,515	0.66%		267,058	0.86%		0.60
18		1.50	404,645	0.60%		229,283	0.74%		0.57
19		1.40	357,476	0.53%		262,971	0.85%		0.74
20		1.10	303,390	0.45%		97,705	0.32%		0.32
21		0.80	246,067	0.36%		61,749	0.20%		0.25
22		1.20	236,521	0.35%		76,154	0.25%		0.32
23		0.80	216,962	0.32%		49,993	0.16%		0.23
24		1.20	120,302	0.18%		48,415	0.16%		0.40
25		1.50	107,343	0.16%		61,086	0.20%		0.57
26		1.50	64,727	0.10%		36,601	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