Questions, answered #8: headspace gauges

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 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.

This guide, presented by Steve Ostrem, Technical Services/Gunsmith at Brownells Inc., details the critical process of checking firearm headspace using Clymer gauges. It emphasizes the importance of headspace for safe operation, explaining how 'Go', 'No-Go', and 'Field' gauges are used to measure chamber length against SAAMI standards. Proper headspace checks protect against potential firearm malfunctions and user injury.

This YouTube video from Brownells focuses on showcasing Forster Headspace Gauges. The description highlights the availability of more information on their website. While no specific firearms, calibers, or detailed applications are mentioned in the provided text, the product itself (headspace gauges) strongly implies a context of firearm maintenance, gunsmithing, and potentially reloading or precision rifle building.

This video introduces the SOTAR BCG 3 Bore & Gas System Gauge Set, a specialized toolset for AR-15 bolt carrier groups. The description details the included gauges, emphasizing their role in ensuring proper fit and function of BCG components. It also provides information on availability, backorder procedures, and mentions complementary tools and components that need to be acquired separately for a comprehensive BCG check, such as bore scopes, torque wrenches, and headspace gauges. The video aims to inform potential buyers about the contents and limitations of the gauge set.

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 a complex gunsmithing process to convert a rare Peabody Rifle from its original 11.15 Romanian Beaumont chambering to .45-70 Government using a sleeve from a Swiss Vetterli barrel. The conversion involves extensive machining of the barrel and breech block, fitting a new extractor, and carefully modifying the chamber for reliable feeding. Crucially, the modification is deemed safe only for black powder loads due to significant thinning of the breech block.

This video details the conservation-focused restoration of a severely flood-damaged Mauser K98. Mark Novak emphasizes preserving original finish over aggressive cleaning, using techniques like rust conversion boiling and careful scraping. Key steps include disassembling the rifle, treating rust with boiling and carding, steaming dents from the wood, and repairing the handguard with polyurethane glue.

This video provides a practical, live-fire demonstration of the 1918 Chauchat light machine gun, focusing on its unique long-recoil action. Mark Novak showcases the weapon's cycling in slow-motion, highlighting the reciprocating barrel and bolt assembly. The demonstration emphasizes the historical significance and operational mechanics of this WWI-era firearm.

This video details the conservation of a barn-found LC Smith 20 Gauge shotgun. Mark Novak demonstrates critical steps including barrel solder testing, proper disassembly with fitted tools, and analysis of the stock's inherent weaknesses. The conservation process involves boiling metal parts to convert rust to black oxide and treating the wood with oil, followed by meticulous reassembly and a successful test fire.