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The KWA LM4 PTR GBBR is a game changer for the airsoft world. The LM4 PTR brings together two characteristics of gas blowback rifles that traditionally remain separate, affordability and reliability. The KWA LM4 PTR has taken many years to engineer and assemble and it's finally ready to come to market. Once the techs here at Airsoft GI got their hands on the LM4 they knew they had to take it to the next level and they did. To increase the modularity and ergonomics of this GBBR they installed a standard M4-A1 style RIS, much like you would find on most military carbines. This standard rail system is an extremely simple piece; however it provides the user with an endless variety of upgrade options. With the rail installed onto the GBBR the user is able to mount any picatinny rail accessory such as flash lights, lasers, Contour Cameras, or vertical grips.
The upgrade factor is something that KWA aims to address with every gun they release, they don't want the player to have to upgrade their guns in order for them to have a good time, and that's exactly the type of mentality that built the LM4. The majority of the gun is constructed of aluminum, such as the receivers, barrel, and buffer tube, as well as high grade polymer, such as the hand guard, pistol grip, and stock, just like a real rifle would be. The bolt movement is crisp and the recoil is very direct. The feeling that this gun gives you while being fired is unmatched by any other gas blowback M4 on the market. The construction and feel of the gun are second to none. One key component to making the gun operate smoothly is the magazine.
The magazine holds the gas to operate the gun and the ammunition, 40 rounds. KWA has taken their years of experience making gas pistols, and magazines, to engineer the LM4 PTR magazine to be as powerful, efficient, and user friendly as possible. For example, the top of the LM4 PTR Magazine is made of high impact polymers where the rest of the magazine is made of metal. KWA has done this for two reasons; first, the top of the magazine will be much more resistant to breaking if dropped, also the magazine top and feeding lip can be replaced and the magazine can be rebuilt in case the worst does happen. The LM4 PTR is an amazing rifle that has been engineered from the ground up to be the first and last gas blowback M4 that you will ever need to buy. All KWA guns, including the LM4 PTR, and even their magazines, are engineered to out perform.
2013-11-12 18:00:48 T. TUSEK Product Information:
So far ive had a good experience with the gun overall.The kick is fantastic and im happy with how it shoots. The one thing i cant stand about KWA gbbrs are the hop up. I made the mistake of losing the tool so now i cant adjust the hop up.
full metal, only plastic is grip and butt stock
decent range and accuracy
KWA's way of adjusting the hop up
Im 65% sure this inst NS2.
Small amount of wobble with the quad rail
2013-03-06 08:49:10 B. GARCIA verified buyer Product Information:
This gun is really great, it functions how it supposed to with no problems. No wobble anywear, except the rail system this comes with. It has about half a centimeter of play both clockwise and counter clockwise, but this is not the Gi techs fault. The rail is actually just a lower end rail. It's actually the amp ris. Although the rail is actually great for its price. This comes from a guy who is used to Daniel defense and PWS rails. The recoil is about 70% of a real ar-15 in my estimation. Which is nice because its not extreme so you can still keep rounds on target. The best part of this gun performance wise, is the range. It's gets 200 plus feet of range and that's with the hop up turned all the way down ( least amout of hop up) and .25 gram
bbs. Its weight is also pretty realistic, this exact setup comes in about 6.5 pounds loaded. One cannot powerstroke this weapon. Although i know i wont use this under normal circumstances it would have been nice in the case I would have to use it. Definitely a great buy.
Cannot power stroke this weapon
Slight rail wobble.
Doesn't come with original hand guards.
Mag price, although when one is going to purchase this, one must be aware of them so it's not much of a con. It's equivalent to buying an LMG and saying it heavy.
I also prefer the front sling mount to be set on the bottom. Not much of a con
2013-01-28 23:16:47 E. KENDALL verified buyer Product Information:
I was skiddish about purchasing this, mostly because nobody wants to buy a gun with no review and get a dud product. I am here to put away any doubts or fears of buyers remorse. When my M4 first arrived I was beyond ecstatic to find out how well this beautiful machine performs. I can say that the gun functions very smoothly. It has a lovely amount of kick that gets you almost feeling like you are firing real steel. This gives me a boost of adrenaline when I play because every shot feels so much sweeter. The sound of this gun firing is so crisp and loud, it will undoubtedly strike fear into the most hardcore of players. Everyone I have played against has no intention of being on the opposite end of the barrel, because this baby really packs a punch, and an accurate one at that!
-The gun shoots HARD! For out of the box, I get a lot of shit from my opponents about the pain this induces.
-Very accurate. I use cans for practice because they are cheap and bountiful. I can shoot this M4 on full auto and hear every last "ping" as each bb rips through the water-filled can. Not a single miss at about 30 yards. I even slapped a rifle scope on it for a while and used it as an out of the box DMR.
-The rail is amazing. Not only is it beautiful but it is sturdy.
-Gas in the mag is enough for 2 clips of ammo in warm weather.
-In cold weather, only this KWA M4 can deliver. I have a KWA GBB M1911 and it doesn't function cold. But luckily I was the only one on the field able to wield this baby. Everyone was amazed I could get a full mag of compressed green gas in 20 degree weather.
-The stock is not of high quality. It feels a little flimsy. And from what I understand you cannot replace it with a standard airsoft stock. You have to get an actual 'real steel' gun stock.
-You are advised to NEVER USE PROPANE. Only use green gas. This is a con because propane is usually so much cheaper. Propane works, but KWA will void your warranty if you use it.
-The O-rings are total crap, they will break and crack eventually. This means you can't fill your mag with green gas anymore. Not a huge problem though, just go pick up a pack of high quality O-rings, slip them in, and you are good to go!
-My biggest and worst issue is that I bought a second mag. I am not sure which mag has the issue now, the original or the spare I purchased. But ONE of them is leaking right now. This apparently is a known issue with the KWA GBB M4. I bought a kit to fix it but I have not yet gotten around to it. Be forewarned, these mags have a leaking problem. And it isn't a slow leak, it is instant emptying.
Anyone like myself who finds themselves in the realm where the airsoft and firearms communities overlap are familiar with the debate over the viability of airsoft guns for firearms training. It goes back a long time. I have used gas blowback pistols for training many years. The cost of operating an airsoft gun, although not inexpensive, is like night and day when compared to a real firearm. For that reason alone I am a proponent of using airsoft for training. It comes with limitations but it is one more tool for the tool box.
And, more recently airsoft has been gaining momentum in the firearm community as a viable training tool, especially as ammo prices have soared. Travis Haley of Haley Strategic Partners, well established in the firearm community, has endorsed airsoft guns as a means for training in a recent video and does an excellent job of explaining the advantages.
I remember getting the occasional law enforcement orders years back for gas blowback pistols because functionally they were quite similar to their real firearm counterparts but the demand was never that great for rifles and I feel one of the primary reasons was the dominance of AEGs on the market. At the time although useable for force on force training they had several shortcomings such as being dimensionally different then real firearms since they need to house a gearbox, motor, and battery. I will not detail all the shortcomings as that would take an inordinate amount of your time and mine.
Developments like the Systema PTW and others fixed some of the problems. For example, the Systema PTW used a new motor and gearbox design that aside from being more efficient enabled the PTW to have a proportionally correct size pistol grip and receiver. Also, the Systema PTW design had a functional "bolt release." I emphasize bolt release because that is what it was meant to simulate, the release of the bolt carrier group to chamber the first round after inserting a new magazine. But in reality the Systema PTW did not have a bolt at all.
That was the shortcoming of the PTW and similar systems; the lack of a bolt carrier group. As a result the charging handle and forward assist did not function. Since the release of the PTW there have been blowback AEGs but that normally consists of a thin metal plate "recoiling" back. Aside from that they are not functionally different from conventional AEGs.
Enter the gas blowback rifle. Over about the last 2 years the airsoft market has seen the emergence of gas blowback rifles. Although gas rifles have been around many years they have been outshined by AEGs but models like the King Arms gas blowback M4 and others have addressed the shortcomings of AEGs, at least in the training sense. The design of such gas blowback rifles bring airsoft guns to a new level as training tools. Like the Systema PTW they are dimensionally similar if not that same as their real firearm counterparts.
The difference comes down to the internal operation. There is not an electrical switch. When you pull the trigger a hammer is released, a bolt carrier group recoils/blowsback; into a buffer tube that has a buffer and spring. As a result the trigger feel, fieldstrip/breakdown, controls, felt recoil are all more realistic. Every sensation and operation is enhanced. The near future release of KWA's gas blowback M4, the LM4, gives me further hope for the future of the gas blowback airsoft rifle as a training tool. KWA promises it will out perform and provide greater efficiency then current platforms.
The only significant shortcomings from my perspective remaining with the gas blowback rifles is they function less efficiently in cold and no marking ability. I discount the decreased accuracy as compared to a real firearm out of hand as my primary concern as a training tool is for force on force scenarios and weapons manipulation practice. In regards to the remaining shortcomings we are light years ahead of where we were a couple years ago. I was there, I remember. The desire is always to have the perfect system but in this world nothing is perfect so for the time being such shortcomings can be worked around and should not deprive us of a viable training tool.
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This product was added to our catalog on Wednesday 16 May, 2012.
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