Replace your default COLT45 Pistol data line with this one :

$ PISTOL			INSTANT_HIT	100.0 100.0	346	-1		5	colt45			20	 25		0.25  0.05  0.09  	0  0		0.75 1.0 	 6 17  6     	  6 16  6  99	3013
$ PISTOL			INSTANT_HIT	110.0 100.0	346	-1		5	silenced		20	 25		0.25  0.05  0.09	1  40		1.0  1.0 	 6 12  6	  6 12  6  99	7011
$ PISTOL			INSTANT_HIT	115.0 125.0	346	-1		5	silenced		20	 25		0.25  0.05  0.09	2  999		1.25 1.0 	 6 12  6	  6 12  6  99	7031
$ PISTOL			INSTANT_HIT	110.0 100.0	346	-1		5	silenced		20	 25		0.25  0.05  0.09	3  5000		1.0  1.0 	 6 12  6      	  6 12  6  99	7011
