Mk18 Mod 1 Brownells Exclusive

This video from Tactical Fellowship, featuring an experienced instructor, details the engineering goals and design enhancements of the BCM MK2 upper receiver. The MK2 aims to match the weight of a standard M4 upper while significantly increasing its structural rigidity, particularly around the ejection port, through strategic material redistribution and thickening.

This expert-level overview of the BRN-180 Gen 3 upper receiver highlights key design improvements driven by user feedback. It details the non-reciprocating charging handle, enhanced steel cam path, integrated dust cover, and a three-position adjustable short-stroke piston system. The guide also covers barrel specifications and AR-15 lower compatibility, offering valuable insights for firearm enthusiasts and builders.

This video provides an expert comparison of the BCM BFH and BCM BFH MK2 AR-15 upper receivers. The MK2 variant features an improved forward assist position for better charging handle access, a thicker profile for increased rigidity and reduced barrel deflection leading to better accuracy, and enhanced gas management systems to redirect gas away from the shooter. The speaker, demonstrating expert knowledge, recommends the MK2 for its functional benefits despite a slight price increase.

This 'Smyth Busters' episode from Brownells debunks the myth that billet receivers are stronger than forged ones. Experts Steven and Caleb explain that forging compresses metal, aligning grain structure for superior strength, especially in aluminum. While billet offers design flexibility and is strong enough for most applications, forged components are generally superior in terms of raw material strength.

This guide breaks down the six essential components of an AR-15 upper assembly, as explained by Randy from AT3 Tactical. It covers the barrel (profiles, calibers, length regulations), muzzle devices, gas system importance, BCG functions, handguard types, and the upper receiver's role. Understanding these parts is crucial for both building and maintaining an AR-15.

This video details the installation of a Geissele MK8 Super Modular Rail on an AR-15. Key steps include using a Geissele Reaction Rod for upper receiver stability, proper torquing of the proprietary barrel nut, and secure installation of the gas block and tube. The rail is then slid on and secured with two cross-bolts using a T-handle hex wrench. Final steps involve muzzle device installation and a thorough inspection.

Proper ammunition storage is crucial for maintaining reliability and safety. Avoid storing ammo in cardboard boxes in damp environments, as this leads to moisture absorption and corrosion. Utilize airtight containers like ammo cans and control humidity with desiccants like silica gel packs. Heat accelerates gunpowder and primer degradation, so store ammo at stable room temperatures. Reloading primers are particularly vulnerable to moisture and require strict airtight storage.

This video demonstrates how to upgrade an AR-15's A2 furniture to Magpul components. It details the removal of the A2 grip using a Bondhus hex set and the installation of a Magpul MIAD grip with interchangeable backstraps for improved ergonomics. The process also covers preparing and installing the Magpul PRS stock, highlighting its adjustable features for cheek weld and length of pull.

This video explores the custom Remington 11-87 shotgun used as a prop in 'No Country for Old Men.' The film required a semi-automatic shotgun with a suppressor, a combination not readily available at the time. Prop master Larry Zanoff details how a non-functional, 'homemade' looking suppressor was custom-built for the 11-87, with the iconic silenced sound effect achieved entirely in post-production.