Brownells BRN XM177E2 UPPER RECEIVER, 12.7'' 1-7 TWIST, PIN/WELD, BLACK BRN-17712-7

Brownells BRN XM177E2 Upper Receiver 12.7" 1-7 Twist BRN-17712-7 Brownells BRN XM177E2 Upper Receiver, 12.7'' 1-7 Twist, Pin/Weld, Black BRN-17712-7 The Brownells BRN XM177E2 Upper Receiver (BRN-17712-7) is a high-quality, retro-modern upper receiver assembly designed to capture the iconic look of the classic XM177E2 carbine while incorporating modern performance features. This complete upper features a 12.7-inch barrel with a 1:7 twist rate and a pinned and welded muzzle device, making it a popular choice for enthusiasts building retro-style AR-15 rifles. Authentic XM177E2 Styling This upper receiver is styled after the historic XM177E2, a compact carbine variant used during the Vietnam War. It features the distinctive short barrel profile and overall aesthetic that appeals to collectors and retro rifle builders who want the classic look with updated reliability and accuracy. 12.7 Inch Barrel with 1:7 Twist The 12.7-inch barrel is paired with a fast 1:7 twist rate, which is well-suited for stabilizing heavier modern projectiles. This twist rate provides excellent accuracy with a wide range of bullet weights, making the upper versatile for both recreational shooting and defensive applications. Pin and Weld Configuration The muzzle device is permanently attached using the pin and weld method. This configuration is commonly used to achieve an overall barrel length of 16 inches when measured from the closed bolt face to the end of the muzzle device, helping maintain compliance with federal regulations while preserving the short, classic XM177E2 appearance. Key Features of the Brownells BRN XM177E2 Upper Classic XM177E2 retro styling 12.7-inch barrel length 1:7 twist rate Pinned and welded muzzle device Matte black finish Complete upper receiver assembly Model Number: BRN-17712-7 Common Applications Retro AR-15 builds XM177E2 clone projects Compact carbine configurations Collectors and historical enthusiasts Modern performance with classic aesthetics Benefits for Retro Rifle Builders The Brownells BRN XM177E2 Upper offers an excellent balance between historical appearance and modern functionality. The 1:7 twist barrel provides better performance with today’s ammunition compared to the original 1:12 twist barrels, while the pinned and welded muzzle device maintains the short, iconic profile of the XM177E2. Why Choose Brownells BRN Products? Brownells is well-known for producing high-quality, purpose-built AR-15 components. The BRN XM177E2 upper reflects their commitment to both historical accuracy and modern manufacturing standards, making it a reliable choice for builders looking to create a distinctive retro-style rifle. Technical Specifications Brand: Brownells Model: BRN XM177E2 Upper Barrel Length: 12.7 inches Twist Rate: 1:7 Finish: Black Features: Pinned & Welded Part Number: BRN-17712-7 XM177E2 Style AR-15 Upper Receiver The Brownells BRN XM177E2 Upper Receiver (BRN-17712-7) is a complete upper assembly featuring a 12.7-inch barrel with a 1:7 twist and pinned/welded muzzle device. Designed with classic XM177E2 styling in a modern black finish, this upper is an excellent choice for retro AR-15 builds and collectors. Part number BRN-17712-7, this Brownells BRN upper delivers both historical appearance and reliable performance. The End