.350 Legend AR-15 Upper Assemblies

.350 Legend Upper Assemblies | Premium Quality Uppers

Moriarti Armaments builds complete AR-15 .350 Legend upper assemblies in Miami, from compact 7.5" pistol uppers to 20" stainless hunting uppers. .350 Legend is Winchester's straight-wall cartridge: it fires .357"-diameter bullets from a case that works with a standard AR-15 lower, 5.56 bolt carrier group and magazine well.

Compare our uppers by barrel length, barrel finish (stainless, fluted or Cerakote color options), handguard (M-LOK or quad rail), muzzle device and receiver, including a side-charging option. Our .350 Legend barrels typically use a 1:16 twist and 5/8x24 muzzle threads; check each listing for exact specs and included parts.

Which .350 Legend upper should I choose?

• 7.5" to 12.5" uppers: compact pistol and SBR builds, and short suppressor hosts.
• 16" uppers: the most versatile choice for hunting and range use on a standard rifle lower.
• 18" to 20" uppers: the most velocity and the longest sight radius for deer-hunting loads.

FAQ

Does .350 Legend need a special bolt?

No. .350 Legend runs on a standard 5.56 AR-15 bolt carrier group. Dedicated .350 Legend magazines are recommended for reliable feeding.

Is .350 Legend legal for deer hunting?

It is a straight-wall cartridge accepted in many straight-wall deer hunting states. Always check your state's current regulations.

Do I need a special lower for a .350 Legend upper?

No. Our .350 Legend uppers fit standard mil-spec AR-15 lower receivers. Short-barrel uppers (under 16") belong on an AR pistol lower, or on a registered SBR.

Related: all AR-15 upper assemblies · 5.56 NATO uppers · 300 Blackout uppers