Ar-15 14.5'' Socom Upper Receiver 1-7

The Luth-AR 14.5" SOCOM upper receiver brings serious performance to your AR-15 build with a combat-proven profile and precision engineering. Built around a 5.56mm 4150 CMV steel barrel with a 1-7" twist rate, this upper delivers reliable accuracy and velocity in a compact package favored by tactical shooters and those running shorter sight lines. The M4 SOCOM profile—paired with the included F-marked front sight base—gives you classic AR ergonomics with modern versatility.

This complete upper comes assembled and ready to drop onto your lower receiver. You're getting Luth-AR's attention to materials throughout: a 7075-T6 aluminum receiver hard-coat anodized for durability, a Carpenter 158 steel bolt with 4140 alloy steel extractor, and an 8620 steel carrier with 4340 cam pin, all heat-treated and finished to Army spec. The barrel features 6 lands and grooves with M4 feed ramps and a button-broached bore (not chrome-lined) threaded for standard 1/2 x 28 muzzle devices. Carbine-length gas system keeps everything compact without sacrificing reliability.

Whether you're setting up a recce rifle, a designated marksman platform, or just want a proven SOCOM upper for your collection, this Luth-AR assembly takes the guesswork out of parts compatibility and quality control. No need to source and match individual components—it's been done for you by a builder who knows what works in the field.

Key Features

• 14.5" M4 SOCOM profile barrel in 5.56mm for compact handling and tactical application
• 1-7" twist rate stabilizes a wide range of bullet weights
• F-marked front sight base for consistent sight picture
• Complete upper with bolt carrier, charging handle, forward assist, and ejection port cover included
• 7075-T6 aluminum A3 flattop receiver with hard-coat anodize finish
• Carpenter 158 steel bolt with Army-spec heat treatment for durability
• Carbine-length gas system for compact profile
• 1/2 x 28 threaded muzzle for accessory mounting

Specifications

Frequently Asked Questions

What lower receiver does this upper fit?

This is a standard AR-15 upper receiver and will fit any mil-spec AR-15 lower. The A3 flattop design is compatible with picatinny-rail mounted optics and iron sights.

Is the barrel chrome-lined?

No. The 4150 CMV steel barrel is not chrome-lined, which is typical of the SOCOM profile. The unlined bore can offer some accuracy advantages and accepts standard AR maintenance practices.

What ammunition does the 1-7 twist rate stabilize?

The 1-7" twist is a versatile rate that stabilizes a wide range of 5.56mm loads. It will handle standard 55-grain ball ammunition, heavier match-grade rounds, and most everything in between. For specific bullet compatibility, consult ballistic stability calculators with your exact ammunition.

Can I use this upper with a pinned gas block for a permanent configuration?

The gas block journal is .750" diameter, standard for AR-15 builds. Any quality gas block designed for that size can be pinned or clamped per your preference and local regulations.