Videos tagged with M4 Feed Ramps

This video provides an in-depth review of the Geissele 18" SPR cut-rifled barrel. It details the barrel's unique features, including the phased raid gas system and larger thread diameter. The review includes detailed bench inspection, headspace gauging, and extensive range testing with four different ammunition loads, presenting group sizes, velocities, and AZE scores for each.

This video reviews the Griffin Armament AR-15 Lowprofile Upper Receiver and the Dual Lock Silencer system. It details the materials, manufacturing specifications, and features of both components, highlighting their compatibility and performance benefits for AR-15 platforms. The review emphasizes the durability, strength, and advanced technologies incorporated into these Griffin Armament products.

This review covers the Harrington & Richardson 653 rifle from PSA, a modern reproduction of a classic AR-15 variant. The rifle features a 14.7-inch pinned and welded barrel for a legal 16-inch overall length, a pencil profile barrel made of 4150 Chrome Moly Vanadium steel, and an integrated carry handle with peep sights. It also includes M4 feed ramps and a modern bolt carrier group made of Carpenter 158 steel for enhanced reliability. The reviewer highlights the rifle's attention to historical detail while incorporating subtle modern enhancements, making it an attractive option for collectors.

This guide details the assembly of a budget-friendly AR-15, focusing on critical points for reliability like castle nut staking. It includes initial range testing and inspection procedures. The speaker, with high authority and analytical tone, emphasizes that while functional for training, budget builds may require careful inspection and may not be suitable for high-stress SHTF scenarios without further reliability enhancements.

This video provides an in-depth review of the Faxon 11.5" 5.56 Gunner barrel, highlighting its unique combination of a mid-length gas system on a short barrel and its lightweight 'Gunner' profile. The analysis covers its construction, gas port size, recoil impulse, accuracy potential, and suitability for suppressed use, offering practical insights for AR-15 builders.

The Del-Ton Sierra 316L is presented as a cost-conscious AR-15 platform, emphasizing its versatility and budget-friendly approach. Key features include a 15-inch MLok handguard, a full-length picatinny rail, and a 16-inch barrel with a 1:7 twist rate. The rifle is chambered in 5.56 NATO and is noted for its reliable function and crisp trigger.

This expert guide from the School of the American Rifle details how to address M4 feed ramp issues caused by tolerance stacking. The video demonstrates how misaligned ramps, even on high-quality parts, can cause feeding failures. It provides a clear, step-by-step process for recontouring barrel extension ramps to ensure reliable feeding, emphasizing the need for careful gunsmithing.

This guide details a comprehensive physical inspection of a Bear Creek Arsenal 16-inch AR-15 barrel, led by an expert from School of the American Rifle. It covers critical measurements like gas port size, headspace, and erosion, along with functional chamber tests and installation techniques including thermal fit and alignment checks. The inspection reveals potential issues with the throat length and crown, impacting compatibility with certain ammunition types.

This comprehensive guide details the autopsy of an Anderson Manufacturing 16-inch carbine barrel, performed by a professional firearms instructor. It covers critical inspection points including headspace, throat depth, muzzle erosion, chamber mapping, alignment, gas port size, and internal condition via borescope. The analysis highlights potential manufacturing defects and their impact on firearm function.

This review covers the Ballistic Advantage Premium Series 22-inch 6.5 Creedmoor barrel, highlighting its construction, accuracy with various ammunition types, and weight savings from fluting. The reviewer, with extensive experience with the barrel, details its technical specifications and performance, offering insights into its value and suitability for different shooting applications.

Paul from Brownells introduces two new AR-15 barrels: a 16-inch M4 SOCOM profile barrel and a 20-inch HBAR barrel. Both are chambered in 5.56 NATO, feature a QPQ nitride finish, 4150 steel construction, magnetic particle inspection, and a 1:7 twist rate. The SOCOM barrel includes an F-marked front sight base and M4 feed ramps, while the HBAR is designed for service rifle competition.

This video showcases new firearm components from Brownells, Magnetospeed, and Arsenal Inc. Key products include lightweight titanium and tin-coated bolt carrier groups for AR-15 platforms, Faxon 6.5 Grendel barrels with specific twist rates and feed ramps, and Arsenal Inc. AK gas blocks with integrated iron sights, some featuring adjustability. The Magnetospeed T1000 steel target indicator is also highlighted as a visual aid for shooting steel targets.