Mk4 Mod 0: Difference between revisions
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[[Category:Weapons]] | |||
[[Category:Weapons of Vietnam]] | |||
{| class="wikitable sortable" style="margin:auto;text-align: center;width:90%" | {| class="wikitable sortable" style="margin:auto;text-align: center;width:90%" | ||
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! rowspan=2 | [[Ammo]] | ! rowspan=2 | [[Ammo]] | ||
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|[[File:Flag_us_new.png|50px]]<br><strong>[[US]]</strong>|| [[File:MK4MOD0.png|500px]]<br><b>[[Mk4 Mod 0]]</b> || [[File:Weapon mk4mod0.svg|500px]] || [[File:Class_Assault.png|50px]] <b>[[Assault]]<br> || 20 / | |[[File:Flag_us_new.png|50px]]<br><strong>[[US]]</strong>|| [[File:MK4MOD0.png|500px]]<br><b>[[Mk4 Mod 0]]</b> || [[File:Weapon mk4mod0.svg|500px]] || [[File:Class_Assault.png|50px]] <b>[[Assault]]<br> || 20[[+1]] / 80 | ||
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|} | |} | ||
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! rowspan=2 | [[Bayonet]] | ! rowspan=2 | [[Bayonet]] | ||
! rowspan=2 | [[Rifle Grenades]] | ! rowspan=2 | [[Rifle Grenades]] | ||
! colspan=2 | Reload Speed | |||
|- | |- | ||
| 35 ||×2.5 = 87.5||×1.2 = 42||×1.15 = 40.25||×0.8 = 28||×0.75 = 26.25||NO||NO | ! Partial!! Empty | ||
|- | |||
| 35 ||×2.5 = 87.5||×1.2 = 42||×1.15 = 40.25||×0.8 = 28||×0.75 = 26.25||NO||NO||2.366 Seconds||3.166 Seconds | |||
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! rolspan=2 | [[Weight]] | ! rolspan=2 | [[Weight]] | ||
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|[[]]||[[]]||Auto+Semi|| RPM|| | |[[Mk4 Mod 0]]||[[Suppressed]]<br>[[Assault Rifle]]||Auto+Semi||750 RPM||7.02° & 1° [[ADS]]||0.950||960 m/s||12.3 g (189.81 gr)||3.89 kg (8.57 lbs) | ||
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! rowspan=2 | [[Place of Origin]] | ! rowspan=2 | [[Place of Origin]] | ||
! rowspan=2 | [[Date]] | ! rowspan=2 | [[Date]] | ||
! rowspan=2 | [[ | ! rowspan=2 | [[Manufacturer]] | ||
! rowspan=2 | Barrel Length | ! rowspan=2 | Barrel Length | ||
! rowspan=2 | Total Length | ! rowspan=2 | Total Length | ||
! rowspan=2 | [[Weapon Script Name]] | ! rowspan=2 | [[Weapon Script Name]] | ||
|- | |- | ||
|FN|| | |FN||[[5.56mm]]||[[USA]]||1967?||Colt||20 in (508 mm)<br>+[[Suppressor]]|| in ( mm)||weapon_mk4mod0 | ||
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<hr> | <hr> | ||
'''The Mk 4 Mod 0''' is a Navy SEAL–modified variant of the [[M16A1]] optimized for maritime and amphibious operations during the Vietnam War. It is best known for corrosion-resistant internal/external treatments and water-drain features intended to keep the rifle functional after submersion, along with SEAL-oriented accessories such as a blast suppressor. | |||
==HISTORY== | |||
Navy SEAL teams in Vietnam employed specialized small arms tailored to coastal, riverine, and amphibious missions. One such weapon was the **Mk 4 Mod 0**, a modified M16A1 pattern configured to better tolerate repeated exposure to saltwater, mud, and full submersion—conditions common to SEAL operations. The modifications described in period/historical writeups emphasize corrosion protection and practical “wet gun” reliability improvements, addressing problems that could otherwise stop a rifle after exiting the water. | |||
Accounts describing the Mk 4 Mod 0 note that key operating components were treated with corrosion-resistant coatings (including Kal-Gard) and that drainage provisions were added (such as a small hole in the buffer assembly and drain paths) to help clear water from the stock/receiver area. Sources also describe SEAL use of a blast suppressor (often referenced as a Mk 2 Mod 0 suppressor) intended to reduce signature and improve water drainage compared to other devices, while still permitting semi-automatic and automatic fire—supporting the SEAL need for a compact, reliable rifle during covert maritime missions. | |||
===Sources=== | |||
* https://hamptonroadsnavalmuseum.blogspot.com/2020/01/the-right-tools-for-job-seal-firearms.html “The Right Tools for the Job: SEAL Firearms in Vietnam” | Hampton Roads Naval Museum (blog) | |||
<hr> | <hr> | ||
<div class="mw-collapsible" style="border:1px solid #ccc; padding:5px; width:100%;"> | |||
<div style="text-align:center; font-weight:bold;">Real-Life Photos</div> | |||
<div class="mw-collapsible-content" style="margin-top:0.5em;"> | |||
<gallery mode="packed" heights="400px"> | |||
File:Mk4 01.jpg|Mk 4 Mod 0 (SEAL-modified M16A1). | |||
File:Ifro1jzyxmfa1.jpg|. | |||
File:Mk4 02.jpg|. | |||
</gallery> | |||
</div> | |||
</div> | |||
<hr> | |||
<div class="mw-collapsible" style="border:1px solid #ccc; padding:5px; width:100%;"> | |||
<div style="text-align:center; font-weight:bold;">Videos</div> | |||
<div class="mw-collapsible-content" style="margin-top:0.5em;"> | |||
| | {{#ev:youtube|7wwBKCtKtm8}} | ||
| | {{#ev:youtube|GyvTDwsYnlQ}} | ||
}} | </div> | ||
</div> | |||
Latest revision as of 07:55, 24 February 2026
| Factions | Weapon | Icon | Classes | Ammo |
|---|---|---|---|---|
 US |
 Mk4 Mod 0 |
 |
 Assault |
20+1 / 80 |
| Damage Base | Headshot × | Chest × | Stomach × | Leg × | Arm × | Bayonet | Rifle Grenades | Reload Speed | |
|---|---|---|---|---|---|---|---|---|---|
| Partial | Empty | ||||||||
| 35 | ×2.5 = 87.5 | ×1.2 = 42 | ×1.15 = 40.25 | ×0.8 = 28 | ×0.75 = 26.25 | NO | NO | 2.366 Seconds | 3.166 Seconds |
| Designation | Weapon Type | Fire Modes | Fire Rate | Bullet Spread ° | Range Modifier | Muzzle Velocity | Projectile weight | Weight |
|---|---|---|---|---|---|---|---|---|
| Mk4 Mod 0 | Suppressed Assault Rifle |
Auto+Semi | 750 RPM | 7.02° & 1° ADS | 0.950 | 960 m/s | 12.3 g (189.81 gr) | 3.89 kg (8.57 lbs) |
| Full name | Caliber | Place of Origin | Date | Manufacturer | Barrel Length | Total Length | Weapon Script Name |
|---|---|---|---|---|---|---|---|
| FN | 5.56mm | USA | 1967? | Colt | 20 in (508 mm) +Suppressor |
in ( mm) | weapon_mk4mod0 |
The Mk 4 Mod 0 is a Navy SEAL–modified variant of the M16A1 optimized for maritime and amphibious operations during the Vietnam War. It is best known for corrosion-resistant internal/external treatments and water-drain features intended to keep the rifle functional after submersion, along with SEAL-oriented accessories such as a blast suppressor.
HISTORY
Navy SEAL teams in Vietnam employed specialized small arms tailored to coastal, riverine, and amphibious missions. One such weapon was the **Mk 4 Mod 0**, a modified M16A1 pattern configured to better tolerate repeated exposure to saltwater, mud, and full submersion—conditions common to SEAL operations. The modifications described in period/historical writeups emphasize corrosion protection and practical “wet gun” reliability improvements, addressing problems that could otherwise stop a rifle after exiting the water.
Accounts describing the Mk 4 Mod 0 note that key operating components were treated with corrosion-resistant coatings (including Kal-Gard) and that drainage provisions were added (such as a small hole in the buffer assembly and drain paths) to help clear water from the stock/receiver area. Sources also describe SEAL use of a blast suppressor (often referenced as a Mk 2 Mod 0 suppressor) intended to reduce signature and improve water drainage compared to other devices, while still permitting semi-automatic and automatic fire—supporting the SEAL need for a compact, reliable rifle during covert maritime missions.
Sources
- https://hamptonroadsnavalmuseum.blogspot.com/2020/01/the-right-tools-for-job-seal-firearms.html “The Right Tools for the Job: SEAL Firearms in Vietnam” | Hampton Roads Naval Museum (blog)
-
Mk 4 Mod 0 (SEAL-modified M16A1). -
. -
.
