From a total of 66,825,319 kills with 30,670,057 headshots

Rank	Weapon	Modifier	Kills	%	Ratio	Headshots	%	Ratio	HS:K
1		1.00	25,047,568	37.48%		4,269,580	13.92%		0.17
2		1.20	11,731,746	17.56%		8,363,502	27.27%		0.71
3		1.00	8,343,042	12.48%		5,859,764	19.11%		0.70
4		1.00	6,624,773	9.91%		4,536,461	14.79%		0.68
5		1.20	4,079,811	6.11%		1,974,462	6.44%		0.48
6		1.50	1,150,485	1.72%		726,260	2.37%		0.63
7		1.40	1,141,272	1.71%		774,700	2.53%		0.68
8		1.20	1,071,102	1.60%		549,292	1.79%		0.51
9		2.00	898,953	1.35%		13	0.00%		0.00
10		1.00	728,882	1.09%		546,091	1.78%		0.75
11		1.80	688,392	1.03%		0	0.00%		0.00
12		1.20	683,482	1.02%		333,252	1.09%		0.49
13		1.00	566,931	0.85%		410,099	1.34%		0.72
14		1.00	565,578	0.85%		367,530	1.20%		0.65
15		1.10	530,555	0.79%		456,213	1.49%		0.86
16		1.40	486,826	0.73%		318,864	1.04%		0.65
17		1.10	443,106	0.66%		265,875	0.87%		0.60
18		1.50	402,864	0.60%		228,378	0.74%		0.57
19		1.40	356,108	0.53%		262,215	0.85%		0.74
20		1.10	302,393	0.45%		97,338	0.32%		0.32
21		0.80	243,552	0.36%		60,941	0.20%		0.25
22		1.20	231,390	0.35%		74,191	0.24%		0.32
23		0.80	215,368	0.32%		49,558	0.16%		0.23
24		1.20	119,736	0.18%		48,159	0.16%		0.40
25		1.50	106,991	0.16%		60,889	0.20%		0.57
26		1.50	64,386	0.10%		36,430	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