300 Win Mag in an AR10 style platorm:
When considering AR10/AR.308 possibilities, remember that the whole system is designed around Short Action cartridges; like .762/ .308, 6.5 Creedmoor, .277 fury, 8.6 Blackout. These are all compatible with AR10/AR308 mags, lowers and uppers.
300 Win Mag is a Long Action cartridge much like 3006, so the bolt would literally not close in your upper receiver, it wouldn't fit in any mags, and it wouldn't fit through the mag well.
GLFA has redesigned the platform ever so slightly to accommodate the larger round by repositioning the safety; enlarging the mag well; developing proprietary magazine(s) and moving the ears of the charging handle forward to allow for the longer throw on ejection; among other things.
I'm fascinated by this design marvel and that's not all they also chamber it for other common hunting rounds. Specifications are listed below.

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Filmed at a closed range private event, under safe condition, with RSO and Medical staff on staff.
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The all new GL10 LA (long action) may look like your standard AR10, 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!

FL10 LA FEATURES

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, MLok, 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: Milspec, 5.56 lb pull
Grip: Standard Milspec
BCG: Custom design
Charging Handle: Custom design
AR10 Compatible parts: Lower parts kits, trigger, safety
Overall Length: 45.50"
Weight: 9.25 lbs

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