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Mark-I High Power Airsoft Gas Pistol w/ Metal Hopup by KJW / ASG

ID: 24078 (GP-KJW-MK1)
4.6 stars, based on 33 reviews
Mark-I High Power Airsoft Gas Pistol w/ Metal Hopup by KJW / ASG
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The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.

FPS Range: 350-450

Color: Black

The KJW MK-I is an exceptional Airsoft hand gun with optimized gas usage, portability, power and range. It is arguably by most as the most effective side-arm for outdoor environments because of the portability (it is fairly light weight and compact to be put away when operating your primary). Yet, it outputs an whopping 350~450+ FPS for the range and power you need to backup your primary. The KJW MK-I is also among the most durable pistol ever constructed with an extremely high gas efficiency.

Dimensions: 10" x 5.5" x 1.6lbs (248mm long)
Range: ~100+ feet
Muzzle Velocity: 350~450 FPS (Measured with .20g BB's and Green Gas)
Gas: Green Gas / Propane Adapter
BB: 0.23g or heavier Matrix & Compatible High Grade bb recommended.
System: Gas non-Blowback.
Hopup: Yes, Adjustable / New metal hopup
Firing Mode: Semi-Automatic.
Package Contents: Gun, Magazine, Manual
Manufacture: KJW (Factory Direct) / ASG (US Distribution)
Magazine Capacity: 17rds

Spare Magazines Available @!


  • Superb FPS / Range and accuracy.
  • High gas efficiency non-blowback design.
  • Superb portability with compact frame.
  • High Strength Polymer Barrel
  • Integrated fixed Front and Rear Sights
  • On-frame Integrated Safety Switch
  • On-frame detachable magazine.
  • Efficient, Non-blowback Design
  • Newest version with metal hopup.
  • 1:1 True to scale replica.

ASG Limited Manufacturer Warranty:

This airsoft pistol is backed by a 3 month limited warranty from ActionSportGames. Should this airsoft pistol fail due to a defect in material or workmanship during the warranty period, ActionSportGames will repair or replace it, free of charge. Please see the included warranty card for warranty details.

33 Customer Reviews

(Write a review)

by Kimberlee R. on 07/02/2022
"This thing is overall a very good pistol. Very sturdy, easy field stripping and my mags will not fall out when I have this shoved in my jeans pockets.
-Easy to take apart
-Very good gas effeicency
-hard shooting
-Long trigger pull (not a big deal)

Overall a good performing gun, not as fun as blowback but you dont burn through green gas.
by Chase P. on 04/19/2014
"I've had this product for over 3 years+ I've never had a problem with it and i just had its fps retested when I had this last trip to the Superstore it still shoot a solid 410fps of course the first 2 shots are much hotter coming out at around 420+ anyway lets get down to the pros and cons.

-Solid build
-easy disassembly/re assembling
-easy self fixes
-very accurate
-very durrible
-hits hard (kids won't cheat it hurts to bad)

-might need some tighting later down the line when it gets older

be safe, have fun, play hard
by Adam H. on 08/02/2011
"Great pistol. I've had mine for about a year or so, never had any real problems with it. Just make sure you buy .28g or .30g bb's or it wont be accurate past 50-75 ft. Made the mistake of buying .25's for it. Trigger pull is tough, but you get use to it with practice. I run mine using a propane adapter (it's a plastic one I bought on evike for $15) and it works as good if not better than green gas.


-Great price
-Lightweight, but rugged
-High Fps
-Accurate, but only with heavy bb's (with .30's I've gotten headshots at 100 ft)


-Loud (can be a pro because when people hear it they think twice about charging at you with their AEG)
-Mine doesn't work well if it's cold out (Gas gets weak after half a magazine)
-Low capacity magazine (buy .30's, spend your time and aim and you won't need more shots)

Overall an amazing gun at a great price. 5/5

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