Zeroing of M16 & SAR 21

last SG · 2005-11-11T04:41:49+00:00

HK isn't the only ones making a piston upper for AR15s, Patriot Ordnance Factory, ZM weapons and Leitner-Wise also manufacture them, I also believe that they...

lionnoisy SG

SAR 21 need not zeroing for already zeroed in factory.

So,after how long in field that it need be zeroed again,3000 rounds?

2.M16

After how many rounds it need zeroing,300 rounds?

Even no round is shot,how long it to be zeroed?

Manager433 SG

I need only 6 rounds to zero my M16.

freedom4ever SG

i need 8 rounds. Crying or Very sad

lwflee SG

Originally posted by lionnoisy:
SAR 21 need not zeroing for already zeroed in factory.

So,after how long in field that it need be zeroed again,3000 rounds?

[b]2.M16

After how many rounds it need zeroing,300 rounds?

Even no round is shot,how long it to be zeroed?[/b]

None of us, outside of those in the trade will know the answer.

lionnoisy SG

oh.I am asking after firing how many rounds ,in the range or in the field,
then u need to zero the rifle again.

SpecOps87 SG

But how true is it that,once you drop the weapon,you have to re-zero the weapon?

lionnoisy SG

Is it applied to SAR 21 also?

SpecOps87 SG

I know it definitely applies to Snipers.

Shotgun SG

SAR-21 scope cannot be removed or adjusted, so cannot zero. Snipers have to mount their scope, hence when it is dropped, they have to re-zero the weapon.

Perhaps SAR-21 picatinny have to re-zero.

Meia Gisborn SG

Assuming the iron sights or scope have not been damaged from the rifle being dropped, and assuming you haven't changed the type of ammo you've been using, the rifle should hold its zero indefinitely.

Now, barrel wear might eventually cause the POI to drift, but this is something that would probably happen only after many thousands of rounds have been fired through the barrel.

insouciant SG

Actually you need to zero to each individual's eye for the M16. Same goes for the M203.

Haven't tried the SAR21, so can't say.

khk SG

yah, different ppl got different aiming posture, so need to zero if the rifle is used by different ppl. if heard tt if u break ur rifle(the pin near the magazine), the zeroing will be off...dun understand abt tt

Shotgun SG

The logic is quite simple actually. The reason why breaking ur M-16 will upset the zeroing is cos of the shift in ur eye position in relation to ur upper reciever.

Both the foresight tip and rear sight apperture is located on the upper reciever of the M-16, the lower reciever, is where the butt is, where u rest ur cheeks and place ur eye behind the rear sight.

When u break the rifle, and fix it back, there MAY be a shift in position on how the upper n lower reciever rest together. Since u need both a 3 point alignment to aim, (foresight, rearsight, eye) it may cause ur aiming to be off, and requiring u to re-zero.

Sar-21... i have no idea how to zero the scope... its fixed... LAD i know have to zero tho.

Moonstriker SG

hahahahahahaha..... sar 21 scope can be plucked out of the handle one. Do that everyday. Basically, after we replace the telescopic sight back into the carrying handle, we do boresighting to align with the LAD n barrel.

M16 wise.. if u drop the rifle, i don't think its gonna affect the accuracy.

Slywong SG

As understand, the scope of SAR21 can be zero. You can see the windage gear by the side of the scope.

My NS warrant trainer said he zeroed his SAR21 until he can achieve groupings of 1 single big hole!!! Shocked Shocked

Dont know whether he hao-siao or not..........

WiNtEr'SkiLL SG

all regulars here ?

Si Geena SG

How lovely... Zeroing does nothing for grouping. Small grouping only indicates good basic marksmanship techniques and use of competition rounds.

Zeroing is the principle of bringing the Point of Aim (POA) to the Point of Impact (POI). All weapons can be zeroed. However, not all shooters can zero efficiently.

Boresighting is the principle of bringing the POA as close to the plane of the barrel, otherwise known as the barrel bore. This is a quick way to dry-zero. A good shooter can aim off if he is familar with his weapon.

The iron sights are quite hardy. The change may only be 1/2 to 1 MOA difference after knocks. I think that's only 5cm to 10cm at 100 metres. Hardly significant...

maggot SG

Use calibration laser bore sighting...no rounds needed Cool

Si Geena SG

Your posting seems kinda pointless. The thread starter asked if weapons, such as the M16 and SAR21 require consistent zeroing or if they should be zeroed if subjected to hard knocks.

And your contribution seemed to fly off on a tangent, what do you mean laser bore sighting does not require rounds? It is only a means of dry-zeroing and there are systematic errors allowed. If in the case where SpecOps mentioned about Sniper, your method will only be expedient at best.

Rockhound SG

SAR the scope can zero wot.....

even when zero also i bobo on SAR....
but on M16 can shoot like nobodies business

i juz dun fancy scopes uh