Radial Delayed Blowback - A Closer Look

This guide, based on expert instruction, details 17 habits to ensure firearms like Glocks and AR-15s last over 20,000 rounds. It emphasizes proactive maintenance, including meticulous round count logging, regular cleaning and lubrication, timely replacement of critical springs and components, and thorough visual inspections. Following these practices prevents malfunctions and extends the operational life of your firearm.

This guide outlines how to build an RPK-inspired rifle on an AR-15 platform. Key modifications include a 24-inch barrel for accuracy, a large muzzle brake for rapid follow-up shots, a bipod for stability, and a fixed stock for consistency. A side-charging upper is also suggested for easier reloading.

This guide details the modification process for the FN PS90, focusing on the installation of the X-PRT90 progressive trigger system and the necessary beveling of a CMMG barrel. It emphasizes safety checks and functional testing after modifications. Instruction is provided by SHORTSHOT TONY, an experienced firearm enthusiast.

This expert guide from the School of the American Rifle details how to identify and address rough carrier key bores in AR-15 bolt carrier groups. The instructor, demonstrating expert knowledge, explains how these manufacturing defects, particularly on Colt components, can lead to premature wear on the gas tube and reduced reliability. Solutions involve replacing the defective carrier key to ensure smooth operation and longevity of the firearm.

This guide details the installation and function of the SpeedTac Bolt Carrier, highlighting its design to eliminate magazine tension during closed-bolt reloads. The video emphasizes this as a significant advancement for AR-15 platforms, potentially offering a competitive edge. The presenter, with an instructional and experienced tone, suggests this feature should be standard on all AR-style rifles.

This guide details the process of removing CMMG's Plan B style muzzle devices, which are secured with Hot Lock thread locker. The video explains that if the device is not heat-cured, it can be removed with a 13/16 inch wrench. However, if heat-cured through shooting or direct application, removal requires soaking in water for at least 30 minutes, potentially followed by a penetrating lubricant. The presenter, Mike from CMMG, emphasizes that heat-curing makes the attachment permanent.

This video demonstrates the correct 'rock and lock' technique for inserting AK-47 pattern magazines into the CMMG Mk47 rifle. It highlights a common user error of 'mag-locking' by attempting AR-15 style straight insertion, which leads to malfunctions. The instruction emphasizes that mastering this AK manual of arms is crucial for reliable operation of the Mk47 platform.

This guide details the installation and function of the CMMG P3 (Personal Position Preset) Screw System. The P3 screw, found in the Zeroed grip's storage compartment, installs into the Fastback receiver extension. It allows users to set a predetermined stop position for adjustable stocks or braces like the RipStock and RipBrace, enhancing consistent shouldering. The guide includes specific tool requirements and adjustment methods for both the RipStock and RipBrace.

This guide details the installation and basic usage of essential AR-15 accessories, including slings, charging handles, handstops, triggers, flashlights, and optics, as presented by Mike from CMMG. It emphasizes proper fitment and function checks, while reinforcing that proper training is the most critical element for any firearm owner.

This guide details the installation of the CMMG .22LR Conversion Kit into a standard AR-15 platform. The process involves removing the existing bolt carrier group and inserting the conversion unit. The video emphasizes the cost-effectiveness of .22LR ammunition for training and introduces new shooters to the AR platform with reduced recoil. It also highlights compatibility nuances, particularly for Mk57 platforms.