TFBTV: AB Arms Mod*X Modular Rifle System for the Remington 700

P1010274

I will be the first to admit that before I started this article, I wasn’t too well versed in aftermarket chassis systems and the benefit of them. I spent a bunch of time reading and learning about the different options out there, what features mattered to me and which ones didn’t. Once the AB Arms Mod*X Modular Rifle System showed up at my door, I felt a bit more prepared to put it through it’s paces.

Lets take a look at the specs of the AB Arms Mod*X chassis.

  • Designed and manufactured in the U.S.A. by a Veteran-Owned company
  • Designed for Remington 700 Short Action – Right Hand
  • Aluminum design, hard coat anodized to Mil-Spec Type III
  • Easy to assemble, drop-in design
  • 20 MOA built into Mil-Spec 1913 rail
  • KeyMod Standard on three sides of the forearm for mounting equipment
  • Conventional slots on two sides of the forearm for mounting equipment
  • Lightweight, 13.5” free-floating modular forearm
  • Will accommodate barrels as thick as the action
  • Comes standard with a LUTH-AR MBA butt stock and A*B Arms SBR P*Grip
  • Designed to accept any AR-15 rifle butt stock and pistol grip
  • Uses MDT and AICS-style magazines in .308 and .223
  • Available in Black and Dark Earth
  • Weight: 3 lbs. 10 oz.
  • MSRP: $799.00

Another hurdle I had was that the only Remington 700 I had at my disposal was a long action in 300 Win Mag. Thankfully my friend Ed with Midway Firearm Refinishing had one of the AAC versions of the Remington 700 in a Hogue stock. Ed was happy to give me a hand reviewing the Mod*X, he has been looking into purchasing a chassis system and was seriously considering the Mod*X. It took a bit of time to find a dry day here in North Texas with the biblical amount of rain we have been receiving, I want to thank Adam and Jason at AB Arms for being patient with both me and the weather.

I gave Ed a call once we had a day that we wouldn’t have to swim to the firing line (my range had just flooded and the road was washed out badly) and headed over to his Cerakote shop. Once I got there Ed had already taken the rifle out of the Hogue stock and was eagerly awaiting the Mod*X. Here you can see all the components that AB Arms sends you. The stock trigger guard and magazine will not be used when the chassis is installed. Ed also planned on running the rifle suppressed so I left that on the table.

P1010251

Taking a closer look at the chassis you can see that it is nicely machined. The magazine release just inside the trigger guard making it easy to reach. AB Arms has informed me that on the next generation of the Mod*X chassis they have flared the mag well to ease magazine changes.

P1010254

One of the issues Ed and I ran into was a standard Wheeler Fat Wrench was not able to reach down into the hole just behind the trigger guard to properly torque the rear hex head bolt that attaches the action to the chassis.

P1010256

AB Arms also includes a Luth-AR MBA stock with the Mod*X, I found it to be rather light and very adjustable. AB Arms has informed me that they will be releasing a folding stock for their chassis that will be lighter than the Luth-AR stock currently included. I am really looking forward to what they have come up with, providing a stock with as much adaptability as the Luth-AR stock while making it a folder AND lighter is quite a feat.

P1010255

The last of the main components that make up the Mod*X chassis is the handguard. Again it is very nicely machined, I don’t know if the little diamonds on the top of the rail were intentional or just a nice byproduct of the machining. Either way it was a nice touch. The 13.5″ handguard includes a Mil-Spec m1913 rail to mount your optic to as well as Keymod slots on three sides of the rail. I wish they offered a m1913 railed version, I understand why they didn’t though. Had they put m1913 on the sides that have the Keymod slots it would be noticeably heavier.

P1010257

We had both hands full when putting the rifle into the chassis so no photos of that. AB Arms includes a easy to follow and comprehensive installation guide. We had no issues getting the rifle together and ready for the range. We did foolishly forget to function check the rifle … Whoops. I guess we are only human after all. The rifle is pretty handsome after we got everything situated.

P1010274

All buttoned up, it is off to the range!

P1010273

I skipped the photos at the range and elected to shoot a video review while there since Ed didn’t feel comfortable using my camera. He later admitted to me that his wife was the photographer in the family. Your secret is safe with me Ed.

Anyhow, here is our video review on the Mod*X chassis. I will go into detail a bit later about our grievance with the pistol grip. The Magazines being tight when fully loaded isn’t uncommon for polymer mags.

So I said we had a bit of a grievance with the pistol grip, the one included with the Mod*X was far too slender in our opinion. Once we got back to Ed’s shop he promptly replaced it with an Ergo grip. As soon as Ed wrapped his hands around the grip and found it to be a perfect fit he looked at me and said that he didn’t want to take the rifle out of the chassis. I called AB Arms on the spot and told them that it was so enjoyable to shoot that I would be sending a check back instead of the Mod*X.

P1010277

I also mentioned that the magazines are a bit on the stiff side when fully loaded. The mags swell when the are loaded to capacity like many other polymer mags on the market. The TorkMag-50 I just reviewed suffered from the same problem.

P1010288

Something that really took me by surprised was how light the rifle was in it’s new chassis. With the Mod*X weighing in at only 3 pounds 10 ounces the rifle including suppressor, optic, and mount weighed in at right around 14 pounds. Not half bad considering I have tested AR-15 rifles that weigh just as much if not more.

P1010258

Here you can see the area of the chassis that the rear tang nestles in. AB Arms took a no fluff approach to the Mod*X focusing on ergonomics, weight savings, customizability, and strength. We did have a small issue with the safety pocket in the chassis not clearing the safety on the factory trigger pack, thankfully that was easily fixed on the range with a field expedient mill (screwdriver) removing a couple thousandths of material on the leading edge of the safety pocket. I chalked this up to Ed’s rifle and not the Mod*X. When I called AB Arms about this Jason said that they had opened the trigger and safety well up to allow shooters to use all after market triggers such as the Timney triggers and other similar styles of triggers on the current production pieces making this a non issue in the future. The chassis I was sent was the first of the production units, the ones rolling off the assembly line currently have the new trigger well.

P1010280

After spending some time at the range with the Mod*X chassis from AB Arms I am nothing short of impressed, so impressed that I will be placing a order for one of the second generation units later this month. The chassis was sent with comprehensive installation instructions and everything you needed for install (minus a torque wrench and bit). The chassis provided a rock solid platform for Ed’s Remington 700. The adjustability in the chassis allow us to set the rifle up exactly how we wanted it. Even though we had a couple small issues with getting the rifle ready to fire, the customer service that I received said a lot about Jason and the team at AB Arms. I have no doubt in my mind that they would do everything they could to make sure a customer was satisfied with their purchase.

As I was writing this review I received a call from Adam at AB Arms letting me know that they will have something very special being released in the next week or so. I can’t say anything yet, but keep an eye out for a press release from AB Arms.

The AB Arms Mod*X chassis has a MSRP of $799 for the black version and $899 for the Cerakote version. You can learn more about the Mod*X chassis at the AB Arms website. I definitely recommend checking them out if you are looking for a stock or chassis system for your Remington 700, not only will you get a very solid rifle chassis system out of the deal, but you will be supporting a veteran owned business and some really great folks.



Patrick R

Patrick is a Senior Writer for The Firearm Blog and works in the shooting sports industry. He is an avid recreational shooter and a verified gun nerd. With a lifelong passion for shooting, he has a love for all types of firearms, especially handguns and the AR-15 platform. Patrick may be contacted at tfbpatrick@gmail.com.

The above post is my opinion and does not reflect the views of any company or organization.


Advertisement

  • Tassiebush

    Hey Patrick the video is still on the private setting 🙂

    • Patrick R.

      Got it fixed, sorry about that.

      • Tassiebush

        Thanks for that. Looks like a neat product.

  • thedonn007

    That sure looks like a nice set up. Are there any quality lower cost options available?

    • ostiariusalpha

      MDT’s LSS chassis does a lot of the same things for about half the price of the Mod*X, but you lose the sweet keymod handguard.

      • JQPub

        Only think to be aware of with the LSS is that you’d have to do a bit of beveling/milling if you want to accommodate an aftermarket trigger like the Jewel, Timney, etc. Are you really going to spend the coin accurizing a 700 with a sweet new chassis and leave the X-mark trigger in there? You could look at the new MDT HS3 instead, but also doesn’t give you the sweet keymod handguard…

        • Ruben

          That is not true at all. I have a Timney and it dropped right in. Only the LSS how Howa does not take Timney but I know they are working on fixing this.

          • Patrick R.

            What chassis do you have?

          • Ruben

            LSS for Remington 700 in .308

          • Patrick R.

            Ah, OK. I was confused.

  • ruinator

    Oh man, I want! Dam fatherhood…..damit!

    • Tassiebush

      That’s a tricky one. One suggestion is to just say it’s for the household defence budget. Every good household budget has a defence budget 😉

  • JumpIf NotZero

    Um… Confirm that 3lbs 10oz is the chassis, top rail, handguard, AND stock? I have my doubts that is a correct total. Ommiting the stock sounds right.

    • Jason Combs

      Yes 3lbs 10oz. That is the total with everything including the stock. I have one built with a legendary arms 308 action and a Christianson carbon fiber barrel that weighs 7lb 3oz without the scope.

  • stephen

    Very nice. I wish they would make a Mod X for the Thompson Center Dimension which has the ability to quickly change barrels & bolts to 10 different calibers. The Dimension also has a 1 MOA guarantee – my best grouping so far is .753.

    It sure would be nice to make it wee bit more tactical.

  • JQPub

    Thanks for the review. Looks like a pretty cool 700 chassis option. Just a little out of my price range at the moment

  • Julio

    Thanks for the review.
    BTW…
    Did you mean to say that you “defiantly recommend” checking out the AB Arms website? Also, do you have a view on a famous company like Hogue having a name even firearms journalists can’t spell? ; )

  • Grindstone50k

    Have to admit, I was expecting a 2k+ price tag. 800 isn’t so bad. Could pick up a barrel and action to put in for not much more and have a pretty sweet set up.

  • Rusty

    I’ve been looking at various models of Rem 700 chassis systems for quite a while. After seeing this article, I knew instantly that I’d found the system I was looking for. I purchased the complete rifle kit from AB Arms. While I’ve yet to receive the rifle, I would like to say that Adam from AB Arms was great to deal with. AB Arm’s pricing and customer service are outstanding.

  • Eric B.

    At around $1,800. I think I’ll pass on this chassis and wait for Ruger to bring out a long action Ruger Precision (complete) Rifle in .300 Win mag or .300 Norma mag.
    Or maybe someone will sell a nice folding chassis at around $1,000. for my Rem./HS Precision .300 Win. mag barreled action.