Top 5 Mistakes When Building an AR-15

Elliott Delp showcases his favorite AR-15 build, a compact and mobile SBR emphasizing both aesthetics and functionality. The build features a Daniel Defense upper receiver known for reliability, paired with traditional A2 sights and modern accessories like a vertical foregrip and red dot optic. Live-fire demonstrations highlight its performance and manageable recoil.

This video focuses on AR-15 lower parts kits, guiding viewers on how to select the right one for their build. It highlights the importance of understanding the differences between kits to ensure a successful firearm assembly. The description also encourages viewers to sign up for CMMG Insider updates and provides links to CMMG's website and social media channels for more information on releases and company news.

This video provides an "autopsy" of an Anderson Manufacturing Bolt Carrier Group (BCG) that failed after only 150 rounds, specifically noting a "sheared lug." The content focuses on a detailed examination of a firearm component failure, suggesting a deep dive into the mechanical aspects and potential causes of the malfunction. This is highly relevant for firearm owners and those interested in the reliability and build quality of AR-15 platforms and their components.

This video features Caleb from Brownells guiding viewers through a complete AR-15 build chambered in the .338 ARC cartridge. The content highlights the powerful subsonic capabilities of the .338 ARC for hunting and suppressed shooting. Caleb details each component of the build, including the barrel, handguard, gas system, suppressor, and optics, culminating in a step-by-step assembly of the upper receiver. The video serves as a comprehensive guide for those interested in building their own .338 ARC rifle or learning more about this specific caliber and its application.

This video showcases a custom Short Barreled Rifle (SBR) build, featuring a Daniel Defense upper receiver acquired as a contract overrun for $600. The creator highlights this build as one of their favorites and invites viewer suggestions for improvements. The focus is on the modification and creation of a unique firearm, emphasizing the cost-effectiveness of the core component.

This video appears to be a work-in-progress update on a firearm build. The title "Halfway through building the 3V out" suggests the creator is documenting the process of assembling or modifying a firearm, likely with custom components or a unique design. The '3V' could refer to a specific build project name, a caliber, or a particular modification series. Without further description, the exact nature of the build remains open to interpretation, but it strongly points towards gunsmithing and custom firearm projects.

This video showcases a custom MK18-style AR-15 build with a focus on high-end tactical accessories. Key components include a Daniel Defense RIS II rail, Unity Tactical FAST mounts with Aimpoint optics, and a Cloud Defensive Rein weapon light. The build emphasizes a 2.26-inch optical centerline for improved ergonomics and features a 10.3-inch barrel chambered in 5.56x45mm NATO.

This video showcases a Zastava ZPAP M70 AK-47 converted into a bullpup configuration. The custom build features a unique chassis with a FAMAS-style carry handle and an integrated optics rail. It retains the standard 7.62x39mm caliber and utilizes a rear-mounted magazine, demonstrating a significant firearms modification.

A $70 Amazon ACOG clone failed critical durability tests, including impact and submersion, while a $1300 Trijicon ACOG is implied to be the reliable standard. The budget optic showed significant water ingress and seal failure after being submerged in a river, rendering it unusable. This comparison highlights the stark differences in build quality and reliability between budget knock-offs and premium, battle-tested optics.

The PSA Sabre is presented as a high-value budget AR-15, retailing around $900. It comes with several factory-installed upgrades like an enhanced charging handle, safety selector, trigger, and takedown pins. Key features include a 13.7-inch pinned and welded barrel and an adjustable gas block for performance tuning.