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Winchester MP4 Semi-Automatic CO2 Rifle

Shoots Pellets & BBs

Winchester MP4 Semi-Automatic CO2 Rifle

Was $129.99
  • List Price $199.99
  • Code: 990004-402 · 0.177 cal · 700 fps ·
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The Winchester MP4 Co2 air rifle has a tactical style and features that will make you fall in love with shooting all over again. The quad weaver/ picatinny rail gives you plenty of options to mount your favorite optics to your liking. Already equiped is a flip-up front and rear adjustable sight, so you'll be ready to aim and fire immediately. Exclusive to the MP4 is the textured pistol grip and adjustable buttstock that will leave you feeling dexterous as you shoot. Hidden away in the magazine are the two 12g Co2 cartridges that power the MP4 and the 16 round clip. The dual ammo rifle shoots .177 caliber pellets or BBs at an outstanding 700 feet per second.


  • Powered by (2) 12-gram CO2 Cartridges
  • Semi-Automatic
  • 16 Round Double Sided Clip
  • Co2 Clip Quick Release Button
  • Shoots Pellets or Steel BBs
  • Rifled Steel Barrel
  • Adjustable Buttstock
  • Flip-up Front Sight
  • Flip-up, Adjustable Rear Sight
  • Composite Stock
  • Metal Receiver
  • Manual Safety
  • Finger Grooved Pistol Grip
  • Integral Weaver/Picatinny Quad Accessory Rail System

Please Note: Do not shoot steel BBs at hard objects or water. They will ricochet! Remember to wear safety glasses. In fact, everyone in the vicinity of the range should wear safety glasses, even if they're not shooting. Remember to remove all pets from the range before you start shooting.

This item is not eligible for coupon discounts.
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  • ManufacturerWinchester
  • Caliber0.177 cal
  • Velocity700 fps
  • ConditionNew
  • Ammo TypePellets & BBs
  • ActionSemiautomatic
  • Barrel StyleRifled
  • Body TypeRifle
  • Fire ModeRepeater
  • Gun Weight4.4
  • Loudness4-Medium-High
  • Magazine Capacity16
  • MechanismCO2
  • SafetyManual
  • Front SightsFlip-up
  • Rear SightsFlip-up- adjustable
  • UsePlinking/ Target Shooting/ Fun
  • Warranty1 Year Limited
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Winchester MP4 Semi-Automatic CO2 Rifle Reviews
4.5 Stars based on 12 Review(s)
Kidd Kool Arrow
Santa Fe, NM
5 Stars
I would recommend this item to a friend.

Winchester MP4 Semi-Automatic CO2 Rifle Shoots Pellets or Steel BBs
November 22, 2016
This is the second Winchester MP4 Semi-Automatic CO2 Rifle, that my teen AirGunner and I have purchased, for they are well constructed, hard hitting, accurate, and inexpensive. With this add to our air gun collection, we have also inexpensively converted to bulk fill with the Air Venturi Bulk-Fill Adapter, attached to a Ninja 13oz HPA Tank, Regulated to 1,100 psi Fits Umarex Steel Force & Steel Storm and Winchester M14 Airgun Magazines...... it also FITS the Winchester MP4 Semi-Automatic CO2 Rifle, and is interchangeable with our other MP4, by just exchanging clips! A tremendous overall shot increase, with out the detriments of CO2 gas.(see images)
Powerful, accurate, well constructed, looks and feels great, dual ammo, inexpensive, Integral Weaver/Picatinny Quad Accessory Rail System makes it very versatile.
Only short skirted pellets can be used with this rifle for the long skirted pellets, will jam the small rotary magazine. The trigger is a two stage that must be completely released for it to index the next round properly. With the stock CO2 configuration of two 12g Co2 cartridges...... it uses way too much gas. CO2 FPS/FPE drop. Low overall shot count.

Grand Prairie, TX
5 Stars
I would recommend this item to a friend.

No Problem & A Lot of FUN
September 12, 2016
I've not experienced any jamming issues, but I avoid using plain lead pellets. I've only used copper coater so far. This has been a really fun & reliable gun. Loaded with a goon scope and laser and some rail accessories and this thing looks real. This is one of my favorite guns.
Great look & feel. Good accuracy. Easy to load & use magazines & Co2.
None so far.

Harrisburg, PA
4 Stars
I would recommend this item to a friend.

Plinking Fun
July 31, 2016
I've had the Winchester M14 air gun for about a year and the MP4 shoots about the same. That is to say that the trigger pull is the same and the accuracy (very good) is the same. The MP4 is a bit heavier than the M14 but if you like to add accessories this is the one for you, lots of picitinny (sp)_ area. You can get 40 to 50 accurate shots out of two CO2 cartridges using 7.0gn. pellets. I didn't add anything to mine as it's heavy enough for me as it is and the sights are plenty good enough for 25-20 yard plinking.
Very accurate, fun plinking. Chonographed 7.4gn. pellets at about 460FPS with fresh CO2 bottles Price is reasonable.
None really, great air gun for the price.

Baton Rouge, LA
4 Stars
I would recommend this item to a friend.

Great Gun
July 19, 2016
I was impressed with the quality and feel of this gun. Lots of space for accessories. I didn't rate it 5 stars because of the frequent misfires. I shot several pellet brands through it and would get about 2-3 pellets not firing out of each cylinder cycle. I also had some pellets getting jammed making it hard to get the clip out to reload. I was generally shooting targets at around 25-30 ft. and it hits pretty hard. Overall a really nice gun. I bought it on sale for $99, should have bought two.
Feels great to hold, looks well built, good power, easy co2 loading, great price ($99).
Frequent misfires like most repeaters I have tried. Pellets can also get jammed making it hard to get the clip out.

5 Stars
I would recommend this item to a friend.

Winchester MP4 is a well made air rifle featuring the look, feel and composition of its Smith and Wesson rimfire and centerfire counterparts.
July 14, 2016
I own a Smith and Wesson M&P AR15/22 in .22LR caliber and a Colt Pre-ban AR15 in ..223 caliber (5.56mm), and this air rifle is right up there in build quality and appearance with those fire arms. Excellent for indoor and outdoor low-cost range practice.
Well made, and mathces the look and feel of it's Smith and Wesson rimfire and centerfire counter part.

Dewayne Wallace
Lubbock, Texas
4 Stars
I would recommend this item to a friend.

Fun plinking gun
July 13, 2016
Functions very well if used right. Not the most accurate gun but fun to tear up cokes cans. Be sure to use full trigger pull to avoid miss fires
Semi auto
Not very accurate

Many Farms, Arizona
4 Stars
I would recommend this item to a friend.

Good rifle, bag magazine.
May 13, 2016
I have owned this rifle for about 2 years and have put maybe 1000 pellets through it and when it runs smoothly it is a dream to plink and have fun in the backyard. My only downfall was with the double-sided rotary magazine, it would jam certain pellets mainly my go to pellets i.e. CPHP, JSB exacts. I would fire H&N copper coated pellets for days and as soon as I filled it with regular lead pellets it would jam after the first side. I have seen another fellow who contacted daisy and got more of these magazines and has had no problems. I will soon be doing the same, the only reason I have had it for a couple years and not done so is because I stepped up to pcp's. Overall whether or not I got a lemon of a magazine, I would highly recommend for backyard fun, oh should I mention it is quite quiet.
"Tactial" feel, adjustable buttstock, realistic mag release, eh trigger.
Rotary magazine.

South Carolina
5 Stars
I would recommend this item to a friend.

Sturdy and reliable
July 3, 2015
Great gun
Dual ammo, durable, strong enough to hunt small game
The gun can jam when using bb's if the bb becomes dislodged from the rotary clip. But it can be fixed with a hard trigger pull

Noah Saiz
Santa Rosa, NM
5 Stars
I would recommend this item to a friend.

Excellent gun!
December 27, 2014
This gun is amazing. I got it for Christmas and I love it so far. It has a high rate of fire and has a bit of weight on it. The pictures are the gun with attachments on it, scope is on its way.
High rate of fire Made of metal, really durable Adjustable stock Fore grip Weaver rails Really accurate with the stock sights
A bit heavy, but is no problem to me

Palatine, IL
5 Stars
I would recommend this item to a friend.

Perfect for winter indoor fun
November 26, 2014
This rifle is very true to form and functions well. I got it to add to my collection of realistic blow-back pistols and it didn't disappoint. For target use indoors the accuracy is terrific but I am not a sharp shooter nor is ultimate accuracy a must. Great fun to shoot and I hope to add a scope or alternate site soon.

germansville, PA
4 Stars
I would recommend this item to a friend.

pretty sweet
October 12, 2014
This is a very nice rifle for the price. almost an exact replica of a M4 and loads of fun to shoot. not very accurate with the iron sight in my opinion. but i didnt expect much accuracy out of it, i plan on buying some accessories for it like a sight and foregrip just for some added realism and possible more accuracy
very accurate replica smooth semi-auto action easy to use lots of fun
not very accurate

Cest hill, Illinois
4 Stars
I would recommend this item to a friend.

Fun gun
January 3, 2014
fun gun to go out and shoot. haven't had a chance to sight in my scope yet due to the cold weather but I'm sure I'll find time to do so. solid gun design but for some reason when firing I did notice that the barrel was loose so I did have to go back and tighten up the screws and this solved the issue. I ended up running 72 rounds of bbs through before I changed co2. Those last 20 rds the accuracy fell a lot. and I dunno if its due to the cold or what but the trigger would hang up and I would have to pull back the bolt to fire another round. it was hit or miss on that but could get really annoying fire 3 nothing then you bull back the bolt fire bolt fire bolt fire then it will shoot off the rest off fine.. dunno if it persist but if so ill update.
Holds 16 rounds 8 per side of clip solid design not super loud compared to other guns I have fired great balance when holding
loose barrel out of box wobbly stock semi auto not working 100% have to to pull bolt back every other round or so...

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