From a total of 67,037,550 kills with 30,725,225 headshots

Rank	Weapon	Modifier	Kills	%	Ratio	Headshots	%	Ratio	HS:K
1		1.00	25,186,169	37.57%		4,288,635	13.96%		0.17
2		1.20	11,757,365	17.54%		8,376,550	27.26%		0.71
3		1.00	8,351,852	12.46%		5,864,421	19.09%		0.70
4		1.00	6,634,092	9.90%		4,542,014	14.78%		0.68
5		1.20	4,096,953	6.11%		1,982,984	6.45%		0.48
6		1.50	1,151,430	1.72%		726,826	2.37%		0.63
7		1.40	1,141,571	1.70%		774,908	2.52%		0.68
8		1.20	1,071,521	1.60%		549,527	1.79%		0.51
9		2.00	901,053	1.34%		13	0.00%		0.00
10		1.00	729,118	1.09%		546,229	1.78%		0.75
11		1.80	690,791	1.03%		0	0.00%		0.00
12		1.20	686,487	1.02%		334,813	1.09%		0.49
13		1.00	567,365	0.85%		410,332	1.34%		0.72
14		1.00	565,976	0.84%		367,750	1.20%		0.65
15		1.10	530,678	0.79%		456,401	1.49%		0.86
16		1.40	487,081	0.73%		318,978	1.04%		0.65
17		1.10	443,479	0.66%		266,081	0.87%		0.60
18		1.50	403,170	0.60%		228,567	0.74%		0.57
19		1.40	356,068	0.53%		262,198	0.85%		0.74
20		1.10	302,721	0.45%		97,457	0.32%		0.32
21		0.80	244,153	0.36%		61,140	0.20%		0.25
22		1.20	231,224	0.34%		74,084	0.24%		0.32
23		0.80	215,751	0.32%		49,675	0.16%		0.23
24		1.20	119,930	0.18%		48,257	0.16%		0.40
25		1.50	107,065	0.16%		60,919	0.20%		0.57
26		1.50	64,460	0.10%		36,466	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