From a total of 293,252,900 kills with 190,283,059 headshots

Rank	Weapon	Modifier	Kills	%	Ratio	Headshots	%	Ratio	HS:K
1		1.00	193,349,756	65.93%		142,983,200	75.14%		0.74
2		1.00	35,985,061	12.27%		3,732,999	1.96%		0.10
3		1.00	18,976,075	6.47%		8,556,678	4.50%		0.45
4		1.20	14,608,928	4.98%		11,216,988	5.89%		0.77
5		1.40	9,636,752	3.29%		7,747,717	4.07%		0.80
6		1.40	8,426,533	2.87%		7,985,201	4.20%		0.95
7		1.50	5,291,612	1.80%		3,992,537	2.10%		0.75
8		1.50	2,640,943	0.90%		1,765,717	0.93%		0.67
9		1.30	1,213,885	0.41%		679,289	0.36%		0.56
10		1.20	769,795	0.26%		443,144	0.23%		0.58
11		1.00	616,227	0.21%		261,379	0.14%		0.42
12		1.10	472,509	0.16%		389,061	0.20%		0.82
13		1.10	268,329	0.09%		123,831	0.07%		0.46
14		1.80	155,383	0.05%		4	0.00%		0.00
15		1.40	138,300	0.05%		105,794	0.06%		0.76
16		1.20	127,610	0.04%		65,995	0.03%		0.52
17		1.80	101,297	0.03%		3	0.00%		0.00
18		1.20	90,804	0.03%		42,680	0.02%		0.47
19		1.40	54,532	0.02%		32,280	0.02%		0.59
20		1.30	53,389	0.02%		29,841	0.02%		0.56
21		1.50	51,859	0.02%		27,152	0.01%		0.52
22		1.30	50,013	0.02%		22,248	0.01%		0.44
23		1.10	47,469	0.02%		24,614	0.01%		0.52
24		1.30	37,933	0.01%		19,401	0.01%		0.51
25		1.30	36,816	0.01%		22,481	0.01%		0.61
26		2.00	28,225	0.01%		0	0.00%		0.00
27		1.30	22,592	0.01%		12,700	0.01%		0.56
28		0.80	77	0.00%		24	0.00%		0.31
29		1.00	67	0.00%		53	0.00%		0.79
30		0.80	66	0.00%		23	0.00%		0.35
31		1.00	46	0.00%		20	0.00%		0.43
32		1.00	17	0.00%		5	0.00%		0.29