M4 vs A2

[mike_j]

I have a m4 .556 with iron sights. I normally shoot at the range at 100 and 200 yard targets and maintain fairly tight groups. My question is if I install a Bull barrel 1:8 twist 24" long, what is the longest range I should hope to maintain tight groups. Considering no wind and choosing the correct bullet ?
Would 1000 yards be out of the question ? And of course I would be using optics. Or will the barrel have no effect on distance?

Yeah, you are right I am new. , thanks

[TheRossRocket]

I have a m4 .556 with iron sights. I normally shoot at the range at 100 and 200 yard targets and maintain fairly tight groups. My question is if I install a Bull barrel 1:8 twist 24" long, what is the longest range I should hope to maintain tight groups. Considering no wind and choosing the correct bullet ?
Would 1000 yards be out of the question ? And of course I would be using optics. Or will the barrel have no effect on distance?

Yeah, you are right I am new. , thanks

Your accuracy will stay the same but your velocity with increase.
Military shoots 5.56 up to 600 yards with a 16 in barrel.
So with the right bullet weight, weather and all that fun stuff, it could be possible, hard but possible.

[goathead]

M4/M4A1 CARBINE
Caliber ................................. 5.56 mm
Weight ................................... w/30 (loaded) round mag 7.5 lb
Length ................................... Buttstock Closed 29.75 in
Buttstock Opened 33.0 in
Mechanical Features:
Riffling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (RH 1/7 twist)
Detachable carrying handle w/integral accessory mounting rail
Buttstock has four positions; closed, 1 R open, 3/4 open, and fully Open.
Firing Characteristics:
Muzzle Velocity . . . . . . . . . . . . . . . . . . . . 2,970 fps
Chamber pressure . . . . . . . . . . . . . . . . . . . 52,000 psi
Cyclic Rate of Fire................. 700-970 rpm (approx.)
Fire Selector ............................ SAFE-SEMI-BURST (M4)
SAFE-SEMI-AUTO (M4A1)
Max Effective Rate of Fire:
Semi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45rpm
Burst/Auto . . . . . . . . . . . . . . . . . . . . . . 90 rpm
Sustained Rate of Fire 12/15 rpm
Max Effective Range 500 meters (individual/point targets)
600 meters (area targets)
Max Range 3600 meters
END OF TASK
0002 00-

[goathead]

M16A4
Caliber.. ........................................... 5.56 mm
Weight.. ........................................... w/30 (loaded) round mag 8.79 Ibs
Length ............................................. 39-5/8 in
Mechanical Features:
Rifling ........................................... (RH 1/7 twist)
Detachable carrying handle w/integral accessory mounting rail
Firing Characteristics:
Muzzle Velocity ........................... 3100 fps
Chamber Pressure ...................... -52.000 psi
Cyclic Rate of Fire........................ 800 rpm (approx)
Fire Selector................................. SAFE-SEMI-BURST
Max Effective Rate of Fire:
Semi ............................................. 45 rpm
Burst ............................................. 90 rpm
Sustained rate of Fire ................... 12/15 rpm
Max Effective Range ....................... 550 meters (individual/point targets)
600 meters (area targets)
Max Range...................................... 3600 meters
0002 00-2