FAQ’S

Most handguards/rails on the market can be modified to fit. If you do not see the rail you want use in the list above or in the category below then it can be modified to fit.

Our Piston systems will fit on all of the mil-spec standard lengths: Carbine, Midlength, & Rifle. We do make Pistol length kits which will fit on all pistol length barrels. However, as Pistol length does not have a mil-spec standard length, some barrels may need to have the drive rod shortened to achieve proper gap. Without the proper gap, the firearm may not function or the drive rod could become damaged/bent. For any questions on shortening the drive rod or you need assistance to properly gap the system, please contact support@adamsarms.net.

The picatinny style gas block sits at the same height as the upper receiver. We developed it this way so the average user can use his or her choice of flip up iron sights.

Our Picatinny gas block is set up with 3 different gas setting that are easily adjusted by pressing down the detent pin and rotating the gas plug either clockwise or counter-clockwise. The 12 o’clock position is the full or open position and should be used with normal fire. The 1 o’clock position is the low or suppressed position and is best used with a suppressor on the firearm. The last 3 o’clock position is the off position and allows your AR to fire without cycling the action. Our Micro Adjustable Blocks have 5 gas settings (100%/74%/53%/32%/11%) for fine tuning or for suppressor use.

Our system comes in 4 lengths: pistol, carbine, midlength, and rifle. The most common listed measurements for these are: pistol ‘ 4’, carbine ‘ 7’, midlength ‘ 9’, and rifle ‘ 12’. These measurements can be found by measuring the distance between the front of the upper receiver and the shoulder where the gas block sits. These measurements are not exact but are rounded to the nearest inch for ease of terminology and for quad rail compatibility.

You can get a more accurate measurement by measuring the barrel extension in the upper receiver and the back of the gas block, where the shoulder starts on the barrel.

All of our systems comes with a lifetime warranty provided you have not modified any of our parts or used them for anything other than their intended usage.

In order to install our system you will need to remove the flash suppressor/muzzle brake from the front of your firearm. If your state requires this to be welded on or permanently attached you will need to find a reputable gunsmith or armorist that is capable of removing the flash suppressor/muzzle brake and legally reattaching it.

Yes it can, however, it has to be a stateside address.

Not at this time, we are processing the paperwork required and will update the website when we are capable of doing so.

No, the Adam’s Arms retro-fit system and uppers are considered an AR accessory and can be shipped directly to the customer. However, any complete rifles or lowers MUST be shipped to an FFL.

We designed our system to be installed by you, the end user, and can easily be installed by anyone with some basic mechanical skills and a good working knowledge of an AR15. You can also call here and talk to one of our representatives directly if you have a question during installation. If you do not feel confident in the installation of our system you can take it to a competent local gunsmith or armorist. They should be able to follow the instructions and install the system for you. If they have any questions they can call us here directly and we will help them over the phone with the installations.

We rely on our reputation in this industry and do everything we can to make sure our customers are happy. Should you need our help call us or email us directly with a phone number, best time to call, and a brief description of what you are experiencing, and we’ll contact you in a timely manner to make sure you are taken care of.

Currently our system will function with the 5.45×39, the 5.56/.223, the 6.5 Grendel, and the 6.8 SPC without any special modifications needed. We offer a 300BLK specific kit as well. We are in the testing stages right now with the .308/7.62 NATO and will update our website when we have a system that will work to our standards.

The bolt spring goes behind the bolt in the bolt carrier and minimizes cam pin wear. Be sure to remove the gas rings from the back of the bolt before installing the bolt spring.

We researched the advantages and disadvantages of a pinned sight and decided that screws on the gas block had more advantages to what we were trying to accomplish. The greatest of these advantages being the systems design is to be installed by the average user without having to permanently modifying the firearm. The screws are more than adequate to hold the gas block in place, and we do not have issues with its security.

Our parts and product are developed to work with each other and are not developed to be used with other manufacturers systems. If you have another manufacturers piston driven AR you may find our products helpful, however, because they are not being used for their intended use the warranty and return policy will be void.

While the time will vary due to the abilities of the installer and type of AR you own, the average customer installs our system in approximately 20 to 30 minutes.

We do not price match with any other dealer, distributor, or online retailer as we do not want to compete with our distributors. We also do not price match if an item goes on sale or special AFTER your initial purchase. If you make a purchase on our website and the item(s) are discounted any time after your purchase, we will not issue a refund, credit, or any free items.

To ensure proper packaging and delivery of the correct items, we are unable to combine multiple orders or offer discounts on shipping

Our system was designed around mil-spec buffer tubes. Using a commercial buffer tube may cause cycling issues due to the extended length of the buffer tube.

In-stock items can take up to 10 business days to ship.