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MARK 4

The Mark 4 is offered in 3 different versions. All are chambered in 6.5 Grendel with 20, 16, and 10.5-inch barrel options.

Due to extended ship times, lead times for your order may vary depending on products ordered. We will email you if your items require an extended ship time. These are custom and hand built so thanks for understanding!

Chambered in 6.5 Grendel
20-inch Bear Creek Arsenal parkerized heavy barrel
1:8 twist and a rifle-length gas system
Custom laser engraved Johnson Dynamics logo

MARK 4: SASS

SASS (Semi-Automatic Sniper System)- Chambered in 6.5 Grendel with a 20-inch Bear Creek Arsenal parkerized heavy barrel with a 1:8 twist and a rifle-length gas system. Over half of the barrel length is bull barrel with a diameter of .980 inches to maintain accuracy at longer ranges with multiple shots. We suggest using Hornady Black 123 grain ELD for maximum potential. This is our most accurate platform. Break into the world of AR-10 range and accuracy while staying in an AR-15 platform.

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MARK 4 - SASS

Mark 4: DMR

Chambered in 6.5 Grendel with a 16-inch Parkerized M4 Bear Creek Arsenal Barrel with a 1:8 twist and a Carbine length gas system. We suggest using Hornady Black 123 grain ELD for maximum potential. If you want a normal carbine length system but also want to engage at longer distances this is what you want.

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UNDER DEVELOPMENT

Chambered in 6.5 Grendel
10.5-inch Bear Creek Arsenal parkerized heavy barrel
1:8 twist and a pistol-length gas system
Custom laser engraved Johnson Dynamics logo

MARK 4: PATROL

Chambered in 6.5 Grendel with a 11.5-inch Alexander Arms barrel: button-rifled, 416 R stainless steel, 1:8 twist rate, 5/8-24 TPI RH muzzle threading, 60-degree muzzle crown, and a carbine-length gas system. We suggest using Hornady Black 123 grain ELD for hunting or self-defense situations. This is our flagship upper that we suggest for multiple uses such as hunting, home defense, or mission and destination unknown situations. This basically can replace the ballistics of a 5.56 but with a shorter PDW-like package.

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MARK 4 - PATROL