1. How is Huldra pronounced?
It is pronounced Hool-dra, or Hūl’dra
2. What is a Huldra?
In Norwegian folklore, the sometimes naked, mythically mysterious and tricky Huldra is a stunningly beautiful woman with long hair and a cow’s tail that lives in the forest realm of the trolls. In order to hide her tail the Huldra can disguise herself as a typical dairymaid, wearing the clothes of a regular farm girl. Although, the Huldra can never hide that she is more dazzling and prettier than other girls.
Hunters and the sons of farmers are often lured to the forest by the Huldra. The Huldra attracts men with her lovely singing and beautiful appearance. The Huldra may hold these poor men under her spell for many years. If the Huldra is unsatisfied, disobeyed, or is angered the Huldra will punish the man severely. Her anger and wrath is brutal and without parallel. Sometimes men that are released or manage to escape the Huldra are found wandering in the wilderness, not remembering what has happened to them.
She has long been associated with hunting and shooting; she might be induced to blow down the barrel of a rifle, causing the rifle thereafter to never miss a shot.
3. Who manufactures this rifle for Huldra Arms?
The Huldra Mark IV series of rifles is manufactured for us by Adams Arms, and the centerpiece of our rifle is Adams Arms proprietary piston system. Huldra Arms spent countless months researching the future of the American battle rifle and came to the conclusion that Direct Impingement (DI) is a thing of the past. Of all the manufactures building piston rifles or systems, Adams stood out as having by far the best solution to the DI problem, as well as an extremely high quality manufacturing and assembly processes. We are sure you will be pleased with your Huldra rifle.
4. How high does the gas block sit?
The gas block is a Picatinny style gas block and sits at the same height as the upper receiver.
5. What handguards/rails can I use (or not use) with a Huldra rifle/upper?
This is the list of handguards we currently know will work with our system without any modifications:
1. Samson Star-C
2. Samson Star-C- EX-P
3. Samson Star-M
4. Samson Star-M- EX-P
5. Samson Star-R
6. Samson Star-4
7. Samson Star-4-DI
8. Samson Star-4-EX
9. Samson Star-DI
10. Samson Evolution Series 4 EX
11. Samson Evolution Series 7
12. Samson Evolution Series 7 EX
13. Samson Evolution Series 9
14. Samson Evolution Series 9 EX
15. Samson Evolution Series 12.37
16. Daniel Defense Standard Length Omega Rails
17. Daniel Defense Standard Length Lite Rails
18. Daniel Defense Standard Length Omega X Rails
19. Daniel Defense 9.5 FSP Lite
20. Daniel Defense 12.5 FSPM Lite
21. Daniel Defense EZ Car 7.0
22. Ergo Grip AR Z Float
23. Ergo Grip AR Z Rail
24. Midwest Industries Gas Piston Two Piece Free Float Forearm
25. Arms #50 Bi-Level S.I.R. System
26. Magpul MOE handguards (most recent version cut to accept gas pistons)
27. Troy Industries Drop In Carbine (Mid length and Rifle length require removal of handguard tension screw and arm)
28. Troy Industries TRX Battlerail Extreme 9" and 7.2"
29. PRI Gen III Delta Carbon Fiber Forearm
30. Newtown Firearms Modular Free Floating Carbine Rail
31. The modified M4 style handguards provided with our standard system
32. Fortis REV™ Free Float Rail System
Any tubular free-floating handguard or any handguard that covers and extends over the gas block will not work with our system. Also, rails that use a proprietary barrel nut that is larger than the mil-spec barrel nut found in the delta ring assembly. Examples of those that have been found to not work are:
1. YHM rails - use a tubular handguard as a base
2. GG&G free-floating rails - use a tubular handguard as a base
3. Vltor VIS - modular upper/rail that can not be modified
4. Daniel Defense FSP (Except the 9.5 FSP Lite)
5. LaRue Rails - uses oversized barrel nut
6. MI Two Piece Forearm Extended Carbine Length - continues in front of the gas block
7. MI One Piece Forearm T Series - uses oversized barrel nut
8. Troy Industries 10' MRF-MX - extends over a low profile gas block
Note: We only recommend installation of any parts or accessories by an authorized armor or very competent gunsmith who is extremely knowledgeable in the AR platform.
1. What kind of warranty comes with this system?
Please see our Warranty information under the “Support” button on our header bar.
2. Do the Huldra Arms complete uppers have to be shipped to an FFL?
No, the Huldra Arms Complete Upper is considered an AR accessory and can be shipped directly to the customer.
3. What should I do if I have a problem with my rifle after purchase?
Should you need our help, email us directly at email@example.com 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. If you purchased the rifle at a Mills Fleet Farm store, you may visit their Customer Service Counter at the front of the store.
4. Do you set up dealer accounts or offer dealer pricing?
Currently we sell our Huldra models at our stores and online only. Some may call this a "house brand" or "private label" which it could technically be, however it is a separate brand that is owned by and carried exclusively by Mills Fleet Farm. We are not setting up any dealer accounts at this time and do not offer dealer pricing.
1. What are the adjustable gas settings for?
The 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.
2. Even though the Huldra Mark IV is chambered in 5.56 NATO, can I shoot .223 through it?
Yes. 5.56x45 ammo is generally more "mil spec" with higher pressures and the .223 is the "civilian market" counterpart. Both cartridges share near identical external dimensions, the difference being powder loads and pressure. All of our Huldra Mark IV 5.56 rifles and uppers are chambered using 5.56 chambers allowing you to shoot both 5.56 ammunition, as well as the lower pressured .233 with no problems. This answer applies to the Huldra Mark IV line of rifles and uppers only, and should not be construed as applying to any other manufacturer, rifle, upper, barrel or gun part.
3. Can I shoot steel case or lower cost import ammo through my Huldra rifle or Huldra upper?
Yes. A lot of steel cased ammo or imported ammo will work just fine. However, there is some steel cased ammo or imported ammo with a lower power factor that will require a reduced power action spring. We have had to change springs in order to shoot "odd ball" import ammunition. Brownell's sells reduced power springs; they are super cheap and easy to change out. This issue is not unique to our product, but rather a general concern people run into with the AR platform, gas impingement or piston.
4. Can I use my DPMS lower on a Huldra upper or do I need to build a lower? How about Rock River?
Yes, to the best of our knowledge all DPMS AR-15 5.56/.223 lowers are mil-spec and will fit our Huldra Mark IV 5.45 upper. However, Rock River Arms intentionally makes their lower out of spec. The rear take down pin is set tighter than what is called for. On most Rock River lowers it will not cause a problem. If you are already running a Huldra upper on a Rock River Arms lower, take the buffer and action spring out of the receiver extension to see if there is any wear. If there isn’t wear on the bottom of the receiver extension, the Rock River Arms “variation” isn’t an issue.
5. What is the purpose of the bolt spring and where does it go?
The bolt spring goes behind the bolt in the bolt carrier and eliminates cam pin wear.
6. What is the recommended buffer for the Huldra Mark IV Complete Uppers?
We use and recommend standard weight carbine buffers and standard weight recoil/buffer springs. Our uppers have gas ports and pressures designed to be used with appropriate ammunition to the caliber and for optimal performance with the mentioned buffer and spring set up. The use of heavy buffers is not necessary, however you may try different buffer as you wish. Keep in mind that running too heavy of a buffer may cause function issues with some ammunition. For our 5.45 upper, we have tested most every 5.45 round available commercially, including surplus, and found this buffer/spring set up to work the best. The use of rifle stocks with rifle buffer and spring is not optimal for our uppers.
1. What is carrier tilt and should I be concerned?
Carrier tilt is a symptom of a problem - not the actual problem. The actual problem is sloppy or loose tolerances in the receiver. Our one-piece carrier combined with our bolt spring eliminates carrier tilt in even the sloppiest of receivers. For those who have normal mil/industry spec AR’s, the design of our system does not have an issue with carrier tilt. The fact is piston systems on the market vary from manufacturer to manufacturer and we believe that ours has several design features that benefit over the competition in the market.
2. What is required to maintain and clean the Huldra Arms Rifle's Adams Arms Piston System?
The Adams Arms Piston System keeps the hot burning gases from entering the receiver. This means the normal time and energy exerted on cleaning your AR15/M16 will be drastically reduced. To clean the system, simply wipe off the parts with a dry, clean towel.
The areas of the system that see the most dirt is the front of the gas block and the back of the plug and drive rod sleeve. These parts may require some scrubbing with a nylon cleaning brush or old toothbrush and some cleaning solvent.
To access the drive rod for cleaning, simply press the detent button and turn the gas plug knob to the 9 o’clock position. Then remove the drive rod and gas plug. Wipe the outside off with a dry, clean towel and spot clean with your choice of solvent and a nylon brush as needed.
If you find an area that has a heavy buildup of carbon which will not come off with solvent, use a knife, pick, or some type of scraping tool to remove the heavy spots. Due to the Meloniting process, the parts are virtually scratch proof and shouldn’t show any wear.
Once cleaned, replace system and continue shooting. Oiling the piston system is not necessary; however, if you choose to do so, apply only a thin coat over the moving parts.
With the 5.45x39 Complete Rifle or Complete Upper, we recommend performing a field cleaning procedure after firing any surplus or corrosive ammunition. We recommend doing this immediately after firing to prevent any rust or corrosion from occurring. Information on how to field disable and clean your rifle and/or upper can be found in the owners manual.
We have also made a quick video demonstrating a quick field clean that can be found here: