AR-15/M16 MAGAZINE FEED LIP GAUGE Reviews & Ratings

AR-15/M16 MAGAZINE FEED LIP GAUGE

The Brownells AR-15 Magazine Lip Gauge is a convenient “Go/No-Go” gauge that lets the user quickly and accurately check for correct feed lip gap on .223/5.56mm magazines. This helps ensure reliable feeding and prevent weapon failure caused by feed problems. Simply slip over the back of a suspect magazine and lightly press gauge between magazine feed lips. If the gauge passes through feed lips, either discard that magazine or use the Brownells Magazine Feed Lip Tool, available separately, to bring them back into specs and restore reliable feeds. If the gauge won’t pass through the lips, the gap is too narrow and must be widened. The Brownells AR-15 Magazine Lip Gauge is machined from 4140 chrome-moly steel heat hardened to Rc 50-55 for dimensional stability, plus resistance to wear and corrosion.

AR-15 Magazine Feed Lip Tool Brownells Part Number: 080000314

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Reviews Summary

The AR-15/M16 magazine feed lip gauge is praised for its ease of use and essential role in ensuring magazine reliability. Users report significant improvements in old magazines and appreciate its design based on military specifications. While some find it somewhat pricey, the tool is deemed invaluable for those working with GI aluminum magazines.

What Reviewers Are Saying

Ease of Use

60%

Many reviews highlight the gauge's straightforward functionality, which allows users to quickly assess and adjust magazine feed lips, making it a favorite among both new and experienced gunsmiths.

Effectiveness

75%

Customers consistently note the tool's effectiveness in diagnosing and resolving feeding issues in magazines, particularly older or heavily used ones, thereby enhancing reliability and performance.

Pricing

40%

While some reviewers mention the gauge may feel expensive, many still find its ability to restore older magazines worthwhile, considering it a smart investment for those who prioritize functionality over cost.

Rehabilitation of Old Magazines

50%

Reviewers appreciate the gauge's role in refurbishing old GI aluminum magazines, emphasizing its importance in restoring reliability and safety, especially amid evolving regulations.

Comparison to New Magazines

45%

Several users share insights about the gauge's necessity when working with older magazines compared to the ease of using newer options like Magpul, highlighting a preference for traditional setups balanced against modern efficiency.

Military Design

35%

Users note that the gauge's design is rooted in military specifications, adding credibility to its effectiveness in gauging magazine feed lip adjustments, which resonates well with customers experienced in firearms.

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Easy to use field gauge for STANAG magaz

This feedlip gauge is based on the gauge developed by the US Army. The drawing and dimensions for the gauge are available online so you could make your own using the right machine shop. The gauge essentially starts with a large dimension (marked NO GO) which tapers down to a smaller dimension (marked GO). If the smaller dimension (GO) fits through the feedlips but stops before the larger dimension slips through, this magazine is good. If the larger dimension fits right through the feed lips, the lips need to be adjusted down to tighten that clearance. I had two Bravo Company Teflon coated magazines give me issues at the range. They were difficult to load using the MagLula and often did not want to feed the first round into the chamber. The cartridges felt very tight in the magazine. I gauged these mags and found the feedlips to barely allow the GO gauge to slip through. The best magazines I own are a set of dry-film D&H Industries magazines and their feedlips barely allowed the NO GO portion to fit through, so the lips were essentially getting close to being loose. Overall: 4/5 stars, kind of pricey but it is an easy way to check the feed lips on your magazines. I was able to identify the tight magazines and fix them using the Brownells feed lip tool.