From a total of 66,832,194 kills with 30,672,198 headshots

Rank	Weapon	Modifier	Kills	%	Ratio	Headshots	%	Ratio	HS:K
1		1.00	25,051,223	37.48%		4,270,057	13.92%		0.17
2		1.20	11,733,063	17.56%		8,364,246	27.27%		0.71
3		1.00	8,343,287	12.48%		5,859,897	19.10%		0.70
4		1.00	6,625,309	9.91%		4,536,749	14.79%		0.68
5		1.20	4,080,479	6.11%		1,974,797	6.44%		0.48
6		1.50	1,150,504	1.72%		726,273	2.37%		0.63
7		1.40	1,141,326	1.71%		774,733	2.53%		0.68
8		1.20	1,071,123	1.60%		549,300	1.79%		0.51
9		2.00	899,004	1.35%		13	0.00%		0.00
10		1.00	728,894	1.09%		546,097	1.78%		0.75
11		1.80	688,464	1.03%		0	0.00%		0.00
12		1.20	683,515	1.02%		333,265	1.09%		0.49
13		1.00	566,936	0.85%		410,101	1.34%		0.72
14		1.00	565,585	0.85%		367,533	1.20%		0.65
15		1.10	530,577	0.79%		456,228	1.49%		0.86
16		1.40	486,846	0.73%		318,877	1.04%		0.65
17		1.10	443,118	0.66%		265,880	0.87%		0.60
18		1.50	402,873	0.60%		228,385	0.74%		0.57
19		1.40	356,113	0.53%		262,217	0.85%		0.74
20		1.10	302,397	0.45%		97,339	0.32%		0.32
21		0.80	243,564	0.36%		60,943	0.20%		0.25
22		1.20	231,439	0.35%		74,214	0.24%		0.32
23		0.80	215,386	0.32%		49,563	0.16%		0.23
24		1.20	119,759	0.18%		48,170	0.16%		0.40
25		1.50	106,995	0.16%		60,890	0.20%		0.57
26		1.50	64,388	0.10%		36,431	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