Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: will this work in my Tactical M4 Viper Assault Rifle
Document: Love the large capacity, although it's pretty big, and if a small bipod is used, you must take the magazine out before setting down the rifle.
I got this for my airsoft m4 viper it's good no problems with it love that it holds 500 rounds planning on getting another one but not much to say about it
I ordered the DBoys Airsoft M4 & M16 Metal 500rd Extended High Capacity Magazine [Hi-Cap Mag]. My order was delivered quickly and came as described. I have had No issues with this product and it fits perfectly! I would recommend buying this product....I know I will be buying more.
I bought this with hesitation not knowing if it would fit my G&G M4, but it fits like a glove! Apparently, G&G brand guns are clones of DBoys, which led me to the conclusion that these should fit, and sure enough, they do. I haven't had any issues with them so far (only had them two weeks), but from what I can see in the build, they're well built.
I received the 500 rd magazine very promptly and it is far better quality than a very similar one I purchased locally. Not only that, it was also half the price!DBoys (via Amazon) is one of the higher quality companies to work with, in regards to customer service!I would highly recommend this company to others.
works grate. m4 and m16 works grate no problems build quality is grate. if your looking 4 a cheep good quality mag this is the one!
last weekend i have used this mags and its really fit so good on my m4 king arms. and they are metal.
its a very big mag for my m4 it does hold about 5oo bbs and is metal but the top is plastic overall its great
it is a high cap so thats good the product says 500 rounds but you probly could fit 600 to 550 so thats good
i guess i was stupid enough to  get happy when it said 500 rd magazine! really bad quality from inside ..... cheap plastic build inside and it dont even fit my jg m4.. personaly ill never buy it again ... not gonna repeat a mistake!!!!! !
Answer: yes