Replace your default MP5 weapon lines :

Better Range :

$ MP5				INSTANT_HIT	 35.0 40.0	353	-1		4	uzibad			30	 25		0.51 -0.01  0.20    0  0	0.75 1.1 	 6  9  7	 6  9  6  30	7001
$ MP5				INSTANT_HIT	140.0 145.0	353	-1		4	uzi			30	 25		0.51 -0.01  0.20    1  250	1.0  1.3 	 6  9  6	 6  9  6  30	7011
$ MP5				INSTANT_HIT	145.0 200.0	353	-1		4	uzi			30	 25		0.51 -0.01  0.20    2  999	1.2  1.5 	 6  9  6	 6  9  6  30	7031

Shoot Faster :

$ MP5				INSTANT_HIT	 35.0 40.0	353	-1		4	uzibad			30	 25		0.51 -0.01  0.20    0  0	0.75 1.1 	 6  9  7	 6  9  6  30	7001
$ MP5				INSTANT_HIT	140.0 145.0	353	-1		4	uzi			30	 25		0.51 -0.01  0.20    1  250	1.0  1.3 	 6  8  6	 6  8  6  30	7011
$ MP5				INSTANT_HIT	145.0 200.0	353	-1		4	uzi			30	 25		0.51 -0.01  0.20    2  999	1.2  1.5 	 6  8  6	 6  8  6  30	7031

One-shoot Dead :

$ MP5				INSTANT_HIT	 35.0 40.0	353	-1		4	uzibad			30	 25		0.51 -0.01  0.20    0  0	0.75 1.1 	 6  9  7	 6  9  6  30	7001
$ MP5				INSTANT_HIT	140.0 145.0	353	-1		4	uzi			30	 25		0.51 -0.01  0.20    1  250	1.0  1.3 	 6  8  6	 6  8  6  30	7011
$ MP5				INSTANT_HIT	145.0 200.0	353	-1		4	uzi			30	 120		0.51 -0.01  0.20    2  999	1.2  1.5 	 6  8  6	 6  8  6  30	7031


-- FOR BACK-UP --

$ MP5				INSTANT_HIT	35.0 40.0	353	-1		4	uzibad		30	 25		0.51 -0.01  0.20    0  0	0.75 1.1 	 6  9  7	 6  9  6  30	7001
$ MP5				INSTANT_HIT	40.0 45.0	353	-1		4	uzi			30	 25		0.51 -0.01  0.20    1  250	1.0	 1.3 	 6  9  7	 6  9  6  30	7011
$ MP5				INSTANT_HIT	45.0 45.0	353	-1		4	uzi			30	 25		0.51 -0.01  0.20    2  999	1.2  1.5 	 6  9  7	 6  9  6  30	7031

ENJOY :) 