AR-15 5.56/.223 16" Slick Side Diamond Stainless Steel Upper Assembly – 10" M-LOK, Triport

16" 5.56 Upper: Specs & Features

This AR-15 5.56/.223 16" Upper Assembly is perfect for building or upgrading your rifle. CA/NY compliant, it features a diamond fluted 416 stainless steel barrel with a 1-8 twist, chambered in 5.56 NATO and also compatible with .223 Remington. The slick side upper receiver, made from billet aluminum, is black hardcoat anodized to meet government specifications and comes without a forward assist or dust cover.

Barrel:

• 16" 416 stainless steel HBAR barrel

• Chambered in 5.56 NATO (also accepts .223)

• 1-8 RH twist

• Button rifled with diamond fluting

• M4 feedramps

• .750 under gas block

• 1/2x28 threads

• Finished with an extreme muzzle brake in nitride and a crush washer

Upper Receiver:

• Slick side (no forward assist/dust cover)

• Billet aluminum construction

• Black hardcoat anodized

• M4 feedramps

Gas System:

• .750 low-profile gas block

• Made from steel and hardcoat anodized

• Carbine-length gas tube

Handguards:

• 12" slim profile free-floating M-LOK rail

• Aircraft-quality aluminum

• Black hardcoat anodized

Note: This upper does not include a BCG or Charging Handle. These must be purchased separately. Images may not be an exact representation of the product.

FAQ

Will this upper fit my AR-15 lower?

Yes. It fits any standard mil-spec AR-15 lower receiver and uses a standard 5.56 bolt carrier group and STANAG/AR-15 magazines.

Can I shoot both 5.56 NATO and .223 Remington?

Yes. A 5.56 NATO or .223 Wylde chamber safely fires both 5.56 NATO and .223 Remington ammunition.

Is a bolt carrier group included?

No. The bolt carrier group is sold separately; any standard 5.56 AR-15 BCG will work.

What twist rate does it use?

A 1:8 twist, a versatile rate for 55 gr to 77 gr bullets.

Related: 5.56 NATO & .223 Wylde AR-15 uppers