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10/20/2017 1:01:18 AM
9/22/2017 12:11:25 AM
Posted: 8/11/2005 2:00:33 PM EDT
Had to replace my front sight post today on my M4. I took one out of an M16. Is there any Diffrence? I zeroed it and noticed that its pretty close to being unscrewed out of it. Is the post longer on a M4?
Link Posted: 8/11/2005 2:52:56 PM EDT
[Last Edit: 8/11/2005 2:54:46 PM EDT by M4Madness]
The posts should be the same height. The M4 and M16A2 front sight bases are different though, with the M4 being taller.

If your M4 upper is not a Colt, then you need the .040" taller front sight post that Bushmaster sells.
Link Posted: 8/11/2005 3:57:50 PM EDT
K thanks
Link Posted: 8/11/2005 6:34:19 PM EDT

Originally Posted By jasoncwrd:
Had to replace my front sight post today on my M4. I took one out of an M16. Is there any Diffrence? I zeroed it and noticed that its pretty close to being unscrewed out of it. Is the post longer on a M4?



This has nothing to do with carbines and rifles. The difference is between fixed handles and flattops.

I have to go over this every time this thread comes up. There are only about 3 people, including me, on this site that know this. As much as this thread comes up, you think there would be more.


Link Posted: 8/12/2005 6:20:34 AM EDT
Make that 4.
Link Posted: 8/12/2005 6:22:39 AM EDT

Originally Posted By M4Madness:
The posts should be the same height. The M4 and M16A2 front sight bases are different though, with the M4 being taller.

If your M4 upper is not a Colt, then you need the .040" taller front sight post that Bushmaster sells.



M4M is correct, but to clarify one thing - the machined shelf that the sight post sits in is higher, the FSBs themselves has basically the same external dimensions.
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