Tax Time Promo - Save 15% off Select Items. More Info

.300 Blackout Caliber

Sort by:
MCS Multi-Caliber .300 Blackout/7.62x39 Upper Receiver Assembly Kit for AR15 / M16

MCS Multi-Caliber .300 Blackout/7.62x39 Upper Receiver Assembly Kit for AR15 / M16

$999.00

Windham Weaponryäó»s Multi-Caliber .300 Blackout/7.62x39 Upper Receiver Assembly Kit will quickly upgrade any Mil Spec AR15 Type Rifle. It offers easy caliber changes by simply switching out the barrel, and if necessary, the Bolt/Bolt Carrier and Magazine. This Kit is completely "ready for the rangeäó? once you add the optic or iron sights of y...


More Info
MCS Multi-Caliber Upper Receiver Assembly Kit for .223/5.56 with .300 Blackout.

MCS Multi-Caliber Upper Receiver Assembly Kit for .223/5.56 with .300 Blackout.

$899.00

The Windham Weaponry Multi-Caliber Upper Receiver Assembly Kit is designed as a unique upgrade for the AR15 Type Rifle - offering quick & easy caliber changes by simply switching out the barrel, and if necessary, the Bolt/Bolt Carrier and Magazine. This Kit-MCS1 is completely "ready for the range" once you add the optic or iron sights of yo...


More Info
Windham Weaponry .300 Blackout Flattop Upper Receiver Assembly

Windham Weaponry .300 Blackout Flattop Upper Receiver Assembly

$585.00

Add the stopping power of the .300 Blackout Caliber to your rifle with this Windham Weaponry Flattop Upper Receiver Assembly. The complete Assembly includes a 16” Medium Profile Barrel with Bolt, Carrier and Charging Handle. The Barrel is 4150M Chrome Moly Vanadium 11595E Steel, Chrome Lined in Bore and Chamber, rifled 1 turn in 7 inches - rig...


More Info
Windham Weaponry .300 Blackout Flattop Upper Receiver Assembly Less Bolt Carrier & Handle

Windham Weaponry .300 Blackout Flattop Upper Receiver Assembly Less Bolt Carrier & Handle

$445.00

A unique aspect of the potent .300 Blackout Caliber is that you can use existing .223/5.56 Bolts, Carriers and Magazines in your rifle as long as you have this Windham Weaponry .300 Blackout Flattop Upper Receiver Assembly. The complete Assembly includes a 16” Medium Profile Barrel machined from 4150M Chrome Moly Vanadium 11595E Steel. It is Chr...


More Info
Windham Weaponry .300 Blackout Flattop Upper Receiver Assembly with Diamondhead VRS Free Float Forend
Windham Weaponry .300 Blackout Flattop Upper Receiver Assembly with Diamondhead VRS Free Float Forend

Windham Weaponry .300 Blackout Flattop Upper Receiver Assembly with Diamondhead VRS Free Float Forend

$980.00

The thin and comfortable Diamondhead VRS Free Float Forend feels just as good as it looks on this .300 Blackout Caliber Windham Weaponry Flattop Upper Receiver Assembly. The complete Assembly includes a 16” Medium Profile Barrel with Bolt and Bolt Carrier. The Barrel is 4150M Chrome Moly Vanadium 11595E Steel, Chrome Lined in Bore and Chamber, r...


More Info
Windham Weaponry 16in .300 Blackout Caliber Barrel Assembly

Windham Weaponry 16in .300 Blackout Caliber Barrel Assembly

$228.00

This accurate Windham Weaponry Barrel is chambered in the unique .300 Blackout Caliber. It is 16” in length, and turned in a medium profile. It includes the Barrel Extension, Standard Barrel Nut, Round Front Handguard Cap, a Mil Std 1913 Railed Sight Base with Sling Swivel. Its muzzle is threaded 5/8” x 24 T.P.I. to accept a variety of flash hid...


More Info
Windham Weaponry 16in .300 Blackout Caliber Barrel Assembly with Bayonet Lug

Windham Weaponry 16in .300 Blackout Caliber Barrel Assembly with Bayonet Lug

$228.00

This highly accurate Windham Weaponry .300 Blackout Caliber Barrel is 16” in length, and turned in a medium profile. It includes the Barrel Extension, Standard Barrel Nut, Round Front Handguard Cap, a Mil Std 1913 Railed Sight Base with Sling Swivel and Baiynet lug. Its muzzle is threaded 5/8” x 24 T.P.I. to accept a variety of flash hiders or m...


More Info