What you will find with their products are nothing but quality and supported with a lifetime warranty just like this 16-inch M4 upper assembly. They are a manufacturer based in Texas that started small and made a name for themselves. Assembled with forward and ejection port doorįirst on the list is a product by Radical Firearms.Use the knowledge that you gained and pick the best one for your modern sporting M4 rifle. Now that you know the variations of the M4 upper receiver, the benefits of upgrading and the things to think about before acquiring, we can now move on to the 5 best M4 upper receivers on the market. There are also some that come with extra Teflon coatings or chrome-lining for better function and will usually last longer. However, there are also some billet uppers on the market that are considered as a more aesthetic option than forged ones. Normally, the best M4 upper receivers are made of 7075 T6 aluminum with a mil-spec, hard coat finish. If you plan to pick every component on your own, then the stripped one will be highly suggested. Stripped or CompleteĪ stripped and a complete upper has a drastic difference in their price point, which is why it is important that you consider which is the right one for you before you buy. They will usually have a large customer base and you can judge the uppers based on their feedback and review.
To ensure that you get the best option, you should go for uppers that are made by a trusted and well-known manufacturer. The first thing that you should consider whenever you are buying components is their reliability. Things to Consider Before Buying Reliability You might also want to change because of aesthetic reasons like its colors, finish and style. Usually, the uppers are exceptionally easy to switch out, allowing you to use different uppers in different situations. You might also want to get a few different uppers since the design of the M4 is extremely modular. It could be a different style or rail length, a forward assist, better ergonomics or maybe a new caliber and with a new upper, you can get the function that was lacking. Sometimes there is a function that you might wish you have on your old upper. It can also improve your accuracy at a much lower cost than changing the rifle. A new upper on the other hand gives you enhanced function and reliability. First of all, old uppers will wear out as time passes by and you will start to experience poorer functionality and reliability. Getting a new upper for your modern sporting M4-style rifle can have quite a few benefits. Benefits of Upgrading Your AR15 Upper Receiver Lastly, you also have the option of a carry handle which can be used as a rear sight or a flattop which gives more versatility. Generally, the two common methods are forged or billet.įorged uppers are usually a bit heavier but also tougher, but you won’t really be able to tell the difference between the weight of a billet and a forged one as they are very minimal. Another difference between uppers is the way that they are built. However, there are some that include a forward assist and dust cover.Īlthough a forward assist is not as necessarily needed as compared to when it was first released, it is still great to have. A stripped one is generally just a piece of metal that houses all the components.
Some uppers are bare and basic, lacking certain components while others are complete with all the necessary components.Ī complete M4 upper receiver will include a stripped upper receiver, forward assist, dust cover, bolt carrier group (BCG), charging handle, barrel, gas system, handguard and sights, optics or other accessories. Are All M4 Uppers The Same?Įven though most uppers look the same, they are actually not. However, before moving on to the list of best M4 upper receivers, we have prepared a guide to identify different uppers, the benefits of upgrading your M4 upper and the things to think about before you decide to buy one. The options of uppers can be overwhelming and lucky for you, we have narrowed it down to a list of the best M4 upper receivers on the market. If you are building your own M4-style rifle or just replacing the old upper, you will realise that there are many options available on the market for the M4 uppers. The M4-style modern sporting rifles are gaining more attention in the firearms industry today and so are its parts.