Great Lakes Firearms and Ammunition, LLC

(4 reviews) Write a Review
$1,170.00 - $1,265.00
Currently, the build timeline is approximately 4-6 weeks from the date your order is placed, and an FFL is received. Once your build is complete, you will be notified by email with shipping information or pickup instructions.
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Product Overview

The all new GL10 LA (long action) may look like your standard AR-10, and it's even the same size - but its patent pending design packs a MUCH. BIGGER. PUNCH! Introducing the first caliber of the series, the .300 Win Mag. Solid, accurate, and able to go the distance... you can't afford to hunt without it!



Barrel: 24” superior quality stainless steel (416R) with 5R rifling, 1:10 twist
Muzzle Brake: 5/8” x 24 stainless steel (416R)
Lower: Aluminum billet (7075)
Upper: Aluminum billet
Handguard: 20” Aluminum, M-Lok, upper picatinny rail
Gas Block: .750, 4150 Steel, Black Oxide Coated
Gas System: Rifle
Stock: Hogue fixed rifle stock, Black
Magazine: GLFA custom aluminum, 5 round, Black
Trigger: Mil-spec, 5.5-6 lb pull
Grip: Standard Mil-spec
BCG: Custom design
Charging Handle: Custom design
AR-10 Compatible parts: Lower parts kits, trigger, safety
Overall Length: 45.50"
Weight: 9.25 lbs


Due to federal regulations, complete firearms and lower receivers can only be shipped to Federal Firearms License (FFL) holders. If you purchase a firearm or lower receiver, we must receive a signed copy of an FFL before we can begin building your order. Please contact your FFL and have them email a copy of their signed license to as soon as you complete your purchase. Please make sure your name and GLFA order number are both included in the email. 

***If your firearm or lower receiver is being shipped to CA, CO, CT, D.C., HI, IL, MD, MA, NJ, NY, VT, please contact us by phone or prior to making a purchase.

Warranty Information

GLFA Lifetime Warranty - See "Returns & Repairs" page for more details.


(4 reviews) Write a Review

4 Reviews Hide Reviews Show Reviews

  • 4
    300 win mag

    Posted by Robert Stafford on Jul 5th 2024

    Well it has taken me a long time to Get this review done. I Bought the 300 win mag back in February, now I work a lot so it took me a few mouths to get out to my range to shoot it. I was using hornaday 195 match rounds, now they say to use 180 grain but I am looking to shoot 1000 plus yards with this gun. Okay out to the the range and the rifle fed the first round from the mag and the second, but after that it would not feed at all. I call them sent the rifle back they went through it and fixed it and got it back to me in two days!!!!! Now first time shooting it after getting it back and the rifle work with no problems!!!!! Finished sitting it in at a 100 yards with 8 rounds though a quarter sized hole!!! I was not very happy at first but now I may even buy another rifle from them!

  • 5
    300 win mag

    Posted by Michael Gosnell on May 12th 2024

    I finally got to shoot this gun. And I love it. I own two other 300 win mags and have been shooting that caliber for almost 50 years. I have read a few things where people haven’t even shot the gun and have nothing good to say. But I was getting a 1 1/4” group out of the box. Now I need to find the round that it likes the best. It didn’t kick as bad as I expected, which is great. Other than the trigger, Great Lakes did a great job with this gun. Two thumbs up on this one. Thanks

  • 5

    Posted by Jake on Mar 4th 2024

    Preforms excellently. No Issues So far and very minimal Recoil.

  • 5
    300 win Mag AR10

    Posted by Tom Panek on Jan 28th 2024

    When 6.5 PRC upper is offered please text me . If the upper works with my existing Aero Precision AR 10 lower. tpanek