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To begin with, the M16A2 and M16A4 are very similar weapons, sharing the same trigger groups as well as the improvements made from the M16A1. The differences are subtle. Most notably, the carrying handle is now removable to reveal a 20mm accessory rail on the top of the receiver for easier mounting of optics. A great deal of M16A4s are also issued with a Knight's Armament Company M5 RAS (rail attachment system) handguard, as opposed to the ribbed polymer handguard found on the M16A2 and M16A3. Colt also produces an R0901 variant of the M16A4 for international sale that differs in that it replaces the three-round burst fire mode with full auto.

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Q: What is the difference between a M16a4 and an M16a2?
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Related questions

Can you put a m16A4 hand rail on an m16A2?

Yes. The M16A2 and M16A4 have the same delta ring and handguard cap, therefore the railed handguard from an M16A4 should fit on the A2.


When was the m16a4 invented?

It was invented by the usmc in 2000 to be a replacement for the m16a2


What is currently US military issue rifle?

M16A2 & M16A4 rifles and M4 series carbines.


Is the m16 a4 fully-auto?

The M16A4 is a select fire weapon, but is limited to three round bursts, the same way the M16A2 is.


What main gun was used by the Marine Corps?

The most commonly issued weapon is the M16 - typically, the M16A2, M16A4, or now, M16A5.


What weapon does a 12b combat engineer get issued in the army?

They could be assigned an M16A2, M16A4, M4, M249, M240B, they could be put on an M2... depends on rank, position within their platoon, etc.


What infantry weapon will replace the M16A2 in the usmc?

In the United States Marine Corps (USMC), the M16A2 assault rifle is currently being phased out in favor of the M16A4, which allows for easier attachment of optics and accessories. The M4 carbine instead replaces the M9 handgun for officers, and the M27 Infantry Automatic Rifle is being adopted to replace the M249 LMG.


What is the newest us army assault rifle?

As far as what's on the official inventory, it would be the FN-SCAR, which currently is only used by special ops units. As far as a general issue rifle goes, it would be the M16A4.


Is a M16 full auto or 3 round burst?

The M16A1, Diemaco/Colt Canada C7, Diemaco/Colt Canada C8, and M4A1 have fully unrestricted automatic fire. The M16A2, M16A4, M16A5, and M4 are limited to a three round burst.


Which modes of fire does the M16a1 have?

Being an assault rifle, the M16A1 has two modes of select fire. It can either be fired in semi-automatic, or fully automatic. The M16A3 shares the same trigger group, while the M16A2 and M16A4 have semi-automatic and three-round burst modes.


What is the maximum effective range of the m16a2 and m9?

What is the maximum effective range of the M16A2 and M9?


Are the M16A1s and M16A2s semi or full auto?

The M16 rifles have three selector settings. On the M16A1, they are Safe - Full - Auto, and the A1 series rifles are capable of unrestricted full auto fire. On the M16A2, M16A4, and M4, the selector settings are Safe - Full - Burst, and they are limited to three round bursts.