With a tough yet lightweight aluminum build and expert craftsmanship, the Faxon Firearms ARAK-21 Upper Receiver is the perfect upgrade for any marksman. Faxon Firearms designed these AR15 Upper Receivers with an ambidextrous charging handle to suit both left and right-handed shooters. This Faxon Firearms ARAK-21 Aluminum Upper Receiver features a top full-length Picatinny rail along with multiple other rails that create a comprehensive M4-style quad rail upper. Upgrade your rifle build today with this Faxon Firearms ARAK-21 AR15 Upper Receiver. Specifications for Faxon Firearms AR15 Upper Receiver Groups 1: Manufacturer: Faxon Firearms Finish: Anodized Color: Black Fabric/Material: 6061-T6 Aluminum Gun Type: Rifle Gun Model: AR-15 Magazine Included: No Features of Faxon Firearms ARAK-21 Upper Receivers: Fully machined from an aircraft grade 6061-T6 aluminum billet in a one piece design that incorporates a full length picatinny rail (Mil-STD-1913) on the top and three additional rails on the muzzle end of the receiver, making it a full M4 style quad rail upper. The top picatinny rail is laser engraved for optic placement. Charging handle is ambidextrous, non-reciprocating, foldable, spring returned and is easily relocated from left to right side without tools by the operator. Model ?39? Eight (8) lug bolt design with involute profile for both right and left hand versions. The extractor is positioned at 3 o?clock. This allows for a left hand version to use the same bolt by simply removing the cam pin and rotating 180 degrees and reinstalling the cam pin. Self-contained firing pin retention system enclosed in a rectangular bolt carrier that no longer requires a cotter pin. Bolted in hardened steel rail system for the bolt carrier to ride on. This allows a metal on metal wear surface for better wear characteristics and much smoother operation. Allows a folding stock to be added, as recoil system does not extend beyond the upper receiver to fully operate. Eliminates the noise and feel of the buffer tube cycling back and forth. Package Contents: Faxon Firearms ARAK-21 Upper Receivers Manual
5 reviews for Faxon Firearms AR15 Upper Receiver Groups 1
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Matt S. –
Really well built upper with an innovative design.Piston reliability combined with super easy barrel swaps (either for caliber or length) as well as being an ambi upper (can setup ejection port for left or right side) make this a very versatile upper.You also do not need a buffer assembly so you can setup the lower with a low profile folder compared to most ARs.This upper is priced in the same bracket as other top tier piston or DI uppers but it offers a ton of value.I am a fan of innovative engineering which is why this upper caught my eye but it is also useful to have for when my lefty friends want to borrow a rifle or if I want to run 7.62x39Wish they would offer some more barrel options for it.
Sidney –
I picked up a new in box Arak-21 with 16inch .300 and .556 barrels at an estate sale recently and it has proven to be by far the best Semi-Automatic rifle I have ever owned. In reliability, recoil, and accuracy and it blows my Sig 556, Bushmaster AR, and Romanian PSL and AKs, out of the water on all counts. Running Precision One ammunition with a Hiperfire SS trigger I got an average of .9 MOA from a bench rest, (one group was less than .3), and the most amazing thing is that even after switching the barrel from .300 to 5.56, a process that takes 3 min, I was able to hit 6 inch plates at 200 yards with the same hold of an unadjusted Meprolight True Dot RDS. I could not believe this at first, and some of you will undoubtedly think I am exaggerating.After my first shooting session when I had some failures to feed from fresh mags, but this was probably a bad mag, Otherwise I have had 100% reliability over 750+ rounds with Magtech subsonic, Precision One 208 Grain match, and personal reloads of 208 and 220 grain pills, both Suppressed and unsuppressed. When I attached a an Omega 45k suppressor onto the .300 barrel it is well below hearing safe with 200, 208, 220 grain reloads, and even runs flawlessly with 150. Its of course even quieter when you turn off the gas. It does get dirty after a couple hundred rounds suppressed, but cleaning it is no harder than an AR, far easier than a Sig 556 or PSL, and the powder buildup has yet to cause malfunction up to 300 rounds suppressed without cleaning.The only downside I would say would be the weight, my build with Omega-45k suppressor and meprolight on an A2 stock is about 9 lbs. I also wish there was more after market support and Im very sad that they discontinued the 12.5 inch .300 blackout barrel, but It is a marvel of engineering that is worth every bit of its high end price.
Cal L –
To be fair I haven't used this a ton, but I have near a thousand rounds through it. I have been super impressed by its reliability. I have yet to have a single malfunction, which is amazing to me. It looks a little off compared to a standard AR up, but the ergonomics hold up. It is more comfortable to use that I thought at first glance. The swapping of calibers is so simple that it is mind blowing. It can be accomplished in just a couple of minutes without needing to be a rocket scientist. It is also super easy to swap the system from right handed to left. Between the caliber swapping, the RH LH swap capabilities, and its AK inspired action, this upper is huge winner.
Ash –
It does not fit properly (Requires hammering the lower pins into the upper in order to fit or filing in contact surfaces). In other words it's out of spec. Noticeable gap between the lower and upper after installation (If you somehow get those pins in the upper). Called their customer service dep and they were not willing to help me with the problem. I have been told that it's just a really tight fit. Don't waste your money on this overpriced upper in my opinion, just buy an Ak instead.
Tim Schwarz –
Excellent machining, quality fit and finish. I’m not giving Faxon two stars. I’m giving Optics Planet two. What’s included is misleading. I thought I was getting an upper assembled ready for 9mm and a 7.62×39 barrel for conversion. Why use ar9 described in the description. I have a 556 faxon upper ordered from Optics Planet already. Why would I not wait for conversions. What drew me to this is the two options i did not have. This is not worth $1000 unless it came in two different calibers. Hope this helps somebody from a mistake.