AR-15 STAINLESS 6.5 GRENDEL / 6MM ARC MAGAZINE Reviews & Ratings

The C-Products 6.5 Grendel / 6mm ARC Magazine provides the discerning shooter with a durable, stainless steel magazine built for long-lasting, super-reliable performance. A polymer anti-tilt follower keeps 6.5 Grendel / 6mm ARC cartridges aligned, and high-quality springs ensure proper feeding shot after shot. The C-Products Magazine features a matte black finish eliminating glare for stealthy operation.

SPECS:Stainless steel, matte black. Molded-polymer follower.

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Reviews Summary

The AR-15 Stainless 6.5 Grendel / 6mm ARC magazines receive mixed reviews. Many users appreciate their reliability, sturdy construction, and effective feeding, while others experience significant issues with feeding, fit, and quality control. Sizing discrepancies and occasional damage to feed lips also emerge as common concerns.

What Reviewers Are Saying

Reliability

55%

A significant number of reviewers express satisfaction with the magazines' reliability, noting that they feed correctly with a variety of ammunition without jams or misfeeds. This positive feedback reinforces the perception that the magazines generally work well across different setups.

Quality and Construction

48%

Reviews highlight both positive and negative aspects regarding the quality of the build. While some users praise the robust materials and construction, others report issues like cracked feed lips and poor design leading to malfunctioning.

Fit and Compatibility

40%

Several users mention compatibility issues with different AR platforms, indicating that while some fit well, others can be too tight or unreliable in certain lowers. This can lead to difficulties in locking and feeding, impacting user satisfaction.

Issues with Feeding

37%

A notable portion of users report feeding problems, particularly with certain rounds and magazine versions. These complaints suggest a lack of consistency in performance, with some magazines functioning well while others exhibit significant failures.

Customer Experience

30%

Some reviewers discuss their interactions with retailers, sharing positive and negative experiences. While a few feel confident in their purchases due to retailer reputation, others express disappointment in the product's performance not meeting expectations.

Value for Money

32%

A mixed sentiment is observed regarding the magazines' value, with some customers feeling they provide good performance relative to their price, while others believe the issues with quality detract from overall value.

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Jams

The 20 round variant works without issue. Not this 10rd version.

by JOSHUA S. on August 13, 2026

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Save your money

Purchased two of these mags some months back. Tried various storing and usage methods but of the three brand of mags I own these cause the most failure to feed issues. I finally tested my mags using fresh dummy rounds and cycling the round through the action of load and ejection. These mags cause the most damage of the dummy rounds.

Do not buy!

I bought 2 of these magazines to try. Both have major feeding issues. Dont waste your money.......the 10 and 5 round versions do work......however they only hold 6 and 4 rounds.

Very disappointed

I recently completed a 6.5 Grendel build and was looking forward to trying it this weekend. A magazine that won't even lock into the lower unless you separate it from the upper is useless.

If I Could Give This 0 Stars...

What can one say about a product that should get 0 stars? I'll try to think of something. These are very flimsy, poorly constructed and cannot be disassembled to clean or correct minor problems. I bought two 10 round C Products magazines for my son's upper build. One had the spring showing in the side window. Because of this the mag wouldn't lock into place while empty and, when loaded and the spring was out of sight, it would lock but the magazine would fall out when there was one round left. It may be the spring just isn't seated on the follower correctly but the magazine can't be disassembled without bending metal tabs to check. Didn't want to do that in case I need to return them. The "good" magazine worked well with steel cased Wolf ammo but, for some reason, would only feed the better Hornady ammo as a single shot; each shot the magazine had to be lifted into the mag well so the bolt would catch the case and feed it. Truly a problem here. I'll have to talk to the techs at Brownells to see if anything can be done but I don't have a lot of hope. It's unfortunate this is the only 6.5 Grendel magazine offered here, I'd pay more for something that worked!

Junk

Will not feed at all. Absolute price of garbage.