AR-10 .243 Win 20" SPR Upper Assembly – M-LOK, SOCOM Lightweight Barrel

AR-10 .243 Win 20" SPR Upper Overview

The AR-10 .243 Win 20" SPR Upper Assembly is a balanced, all-around .243 Winchester upper for hunting and precision shooting. A 20" SOCOM lightweight barrel in 4150 chrome moly vanadium steel with a nitride finish and 1:8 twist keeps the rifle handy while still delivering the flat trajectory .243 Win is known for.

Specifications

Key features

• 20" SPR-style barrel: a good balance of velocity, weight and handling.
• Rifle-length gas system for smooth, soft cycling.
• A2 flash hider with standard 5/8-24 thread for easy muzzle-device upgrades.
• Free-float M-LOK rail for accuracy and accessory mounting.

Note: Bolt carrier group and charging handle are not included. Use a standard .308 Winchester AR-10 BCG and charging handle; .243 Win shares the .308 bolt face. Images may not be an exact representation of the product.

FAQ

Is a 20" barrel a good choice for .243 Win hunting?

Yes. 20" is a common hunting length: it gives most of the cartridge velocity while keeping the rifle easier to carry than a 22" or 24" barrel.

Will this .243 upper fit my AR-15 lower?

No. .243 Winchester is a .308-family cartridge and needs a large-frame AR-10 lower. This upper fits Moriarti and DPMS-pattern (LR-308) low-profile lowers; fit can vary on other large-frame patterns.

What magazines and bolt do I need?

Standard .308 / 7.62x51 AR-10 magazines and a standard .308 AR-10 bolt carrier group work with .243 Winchester.

Do I need an FFL to buy this upper?

No. An upper assembly is not the serialized part of the firearm, so it ships directly to you where legal. Check your state and local laws before ordering.

Compare all .243 Win AR-10 uppers at Moriarti Armaments.