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AR-15 Magazine Lip Gauge
AR-15 Magazine Lip Gauge
AR-15 Magazine Lip Gauge
AR-15 Magazine Lip Gauge
AR-15 Magazine Lip Gauge
AR-15 Magazine Lip Gauge
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BROWNELLS - AR-15 Magazine Lip Gauge

7 Reviews
AR-15 Magazine Lip Gauge
Brownells #
080000744
MFR #
BROWNELLS AR-15 MAGAZINE LIP G
UPC
050806109902
$64.99
Coupon Code
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Specifications
Make Model Fit:
AR-15.Universal
Color:
Unfinished
Material:
4140 Steel
Quantity:
1
Restriction
Gun Tool Restriction:
Yes
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What is the BROWNELLS - AR-15 Magazine Lip Gauge?
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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AR-15/M16 MAGAZINE FEED LIP GAUGE REVIEWS

4.9
7 Reviews
5 Stars
86%
4 Stars
14%
3 Stars
0%
2 Stars
0%
1 Stars
0%
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.
5
Easy to use
Easy to use. And a necessary tool got the true gunsmith.
Would you recommend this? Yes, I would recommend to a friend
by Kelly Webb on July 04, 2025
Verified Purchase
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5
AR-15 Mag gauge.
GREAT. Fast as usual .
by KENNETH FOX on December 26, 2024
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5
This gaude worked great
On brand new magazines the gauge barely goes down between the lips. On two magazines I had that were constantly misfeeding, the top of the gauge went almost all the way down to the feed lips and on the other the top of the gauge went below the feed lips.
Would you recommend this? Yes, I would recommend to a friend
by rlwieneke on December 19, 2024
Verified Purchase
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5
Magazine lip gauge
Excellent tool to measure the feed lip closure gap. Indispensable too to ensure reliable magazine lips. I highly recommend one for AR-15/M-16 aluminum magazines.
by None on December 20, 2021
Was this review helpful? 2
5
check specs of GI aluminum mags
I had 16 old well used GI aluminum magazines that were accumulated about 20 years ago during the first "assault weapon" ban. I'd been meaning to rehab them for a very long time and now looking at the next generation of legislation on the horizon thought now would be the time. I disassembled and cleaned all the magazines. I was able to quickly easily and confidently inspect all the feed lips with the Brownells lip gauge and cull the magazines that were out of spec. I replaced all the springs with new springs and the black GI followers with the green anti tilt followers and the base plates with the original Mag Pull Ranger base plates. I refinished all the mags with perma-slik G. Now I have 12 like new GI aluminum mags. Did the Brownells Feed Lip gauge make it possible to do the project? Yes , it was key to insuring reliability. Am I a finacial genius? No I am not. I could have bought 6 Mag Pull magazines for the cost of the gauge and another 6 for the cost of the perma-slik G and been money ahead with 12 brand new Mag Pull magazines. So, if you insist on being old school and run GI aluminum magazines you should have this gauge. Otherwise , just run mag pul magazines. The dust cover serves as a feed lip gauge.
by uglybaldguy on May 28, 2021
Was this review helpful? 4
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Customer Questions
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