Brownells - Clymer Headspace Gauges, Go No/Go and sets

This video addresses common questions regarding firearm headspace gauges, specifically focusing on Go, No-Go, and Field gauges. The description emphasizes that the content is for learning purposes and explicitly warns individuals without the necessary skills not to attempt the procedures shown. It also includes a Patreon link for viewer support.

This guide, presented by Larry Potterfield of MidwayUSA, details the critical process of checking headspace on an AR-15. Proper headspace is essential for safe and reliable operation. The procedure involves using specific 'go' and 'no-go' gauges with a stripped bolt and a clean chamber to ensure the firearm meets minimum and maximum headspace specifications. Failure to address incorrect headspace can lead to malfunctions or dangerous conditions.

This video demonstrates how to measure headspace on a bolt action rifle using Go and No-Go gauges. It emphasizes safety by ensuring the firearm is unloaded and the bolt is removed. The process involves inserting gauges into a clean chamber to check if the bolt closes, indicating proper or excessive headspace, crucial for safe operation.

This video details the critical process of checking headspace on an AR-15 build, emphasizing safety and proper function. It covers the complete disassembly of the bolt carrier group, the precise use of 'Go' and 'No-Go' gauges to verify chamber dimensions, and the reassembly of the BCG. The demonstration highlights the importance of ensuring the bolt does not close on a 'No-Go' gauge to prevent dangerous headspace issues.

Mixing and matching AR-15 bolt carrier groups (BCGs) is generally possible due to standardized civilian market manufacturing. However, it is crucial to verify safety by checking headspace with a 'no-go' gauge. Swapping worn parts or high-round count BCGs can introduce compatibility issues and potential malfunctions.

This video details the process of changing an AR-15 barrel to .300 Blackout, highlighting that only the barrel needs replacement. It covers essential tools like an action block and armorer's wrench, and emphasizes critical steps such as verifying headspace before installing the new barrel. The demonstration uses a Brownells B-TAC 16-inch carbine barrel with a 1:8 twist rate.

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.