Home CMMG What Is An AR-10 & What Parts Fit What?? DPMS vs. Armalite...

What Is An AR-10 & What Parts Fit What?? DPMS vs. Armalite vs SR25 vs. Aero Precision? | Episode #1

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Hey, the truth about AR-10 or .308 rifles and building / assembling one… NOTHING FITS! Well, actually, that’s what you’ve been led to believe. Today, let’s cut off ANY outdated AR-10 information and really get down to brass tacks! This is the beginning to your next AR-10!

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00:00 – Intro
01:00 – AR10 Compatibility
01:23 – AR10 Caliber Options
03:24 – AR10 History Lesson
04:00 – Best Brands Of AR10 Parts
05:04 – Armalite AR10
06:02 – DPMS LR-308
06:35 – Knights Armament SR-25
06:53 – DPMS G2
08:32 – AR15 / AR10 Compatibility
09:55 – Outro

We strive to provide the growing AR-15 shooting community with helpful, fact-driven information about the AR-15 & AR-15 style firearms and accessories to do our part in bolstering a more well-informed community and safer when handling, building or shooting their personal firearm. Let’s face it, we all have to start somewhere when it comes to becoming a firearms expert. Our goal is to help you get there one small step at a time. **The purpose and content of this video is to provide general information regarding the products and their applications on any/all related firearms that strictly comply with all federal, Minnesota state, and local laws. The viewer expressly agrees that AT3 Tactical LLC; its officers, directors, employees and agents shall not be liable for any damages or losses related to the products and information provided in this video and hereby agrees to hold the foregoing harmless from any such losses or damages. AT3 Tactical LLC is a Federal Firearms Licensee.

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30 COMMENTS

  1. I WISH I WOULD HAVE SEEN THIS BEFORE…. I bought a Noreen AR 10 lower. I thougth they were mil spec and I could just throw a PSA on top… easy cheesy. The lower is suppose to be a LR-308 DPMS compatable… and the PSA might be the same but the lower does look different. At least it was only 90 bucks. Still, it's going to grive me crazy knowing I have it… just sitting there. Any idea?

  2. 6:15 The prevalence of the LR-308 platform is why I decided to go with a DPMS lower. Also the G2 would look nice with a fixed buttstock like the one depicted on the LR-308 in the diagram as well as an integrated A2 carry handle-style upper

  3. To further muddy the waters you did not mention the "Mutant "Ar action that GMMG makes because the 7.62mm X 39 mm bolts use a Ar 10 Dia bolt , but the carrieris are intermediate length BGG. Not as long as a Ar 15 but shorter than a AR10..

  4. This looks like a great series. I contemplated building an AR-10, after reading about the Armilite .260 rifle, but uncertainty of parts availability and compatibility killed my interest. Eventually, I decided to go the AR-15 route, only to learn Barrett Arms was designing and preparing to build quality AR-10s for the military. As everyone knows, Barrett builds great rifles. I hope to someday field an AR-10 for hunting. Until then, I'll just have to be satisfied with reading about them. Thank you for sharing this series!

  5. Thanks – another great series chock full of good info. My last build before our state's AWB went into effect was an Aero Enhanced (internal) AR-10 with Wilson Barrel and BCG. Only issue was feed ramps on barrel extension sticking out past receiver feed ramps. Runs fine, but I'd like to try other part combos. Unfortunately, now we can't even buy replacement parts here!

  6. Had been looking at DPMS lowers, then found a great deal on a Diamondback (Armalite cut) then I learned the difference. I've gone on to build an extra 6.5 upper, and then bought everything for a complete other build. Just about everything came from Diamondback, which actually has some really good prices on components.
    Great info!

  7. Man i spent over 5 k on my last 308 dpms build, got it to 5.8 lbs without the scope and suppressor. Built on a Roam rifles receiver set and smoke composites furniture, with a titanium bcg, and BSF carbon fiber wrapped barrel.

  8. Good Video dude.
    Building an AR-10 from Scratch for starters ends up throwing people into a rabbithole… Like you said. Mostly because it have something to do in noticing the differences between AR-10 Pattern vs Aero Precision/DPMS LR308 pattern

    It's understandable why it's quite common to see LR308 / DPMS Gen II / PSA Gen III getting built from scratch and AR-10 pattern rifles being the option for those who wants to buy a complete rifle from the get-go in case of a better financial condition.

    On AR-10 Pattern (and even that some of these brands does their own stuff, it's quite the niche):
    – ArmaLite
    – KAC
    – LMT Defense
    – Diamondback Firearms
    – LWRCI
    – STAG Arms
    – Daniel Defense
    – LaRue Tactical

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