Description
When a build needs a fresh safety selector or your old one has gotten sloppy, this is the kind of part you want doing the job without any drama. The CMMG AR-15 Safety Selector is a single-sided, mil-spec design machined from steel with a parkerized black finish that blends in with the rest of your fire control group. It uses the familiar 90-degree throw, so the muscle memory you already have carries right over, and the detent locks into safe and fire with a clean, positive click.
Where the CMMG Safety Selector Earns Its Keep
This is a SAFE/FIRE two-position selector meant for standard semi-auto AR-15 lowers. The steel construction means it holds up to years of thumbing back and forth without wearing round or getting mushy, and the parkerized coating adds a layer of corrosion resistance that plays nice with oil and holds finish over time. CMMG builds these to meet or exceed mil-spec, so tolerances are consistent from one unit to the next. It's the sort of part that just works and then gets out of the way.
Fitting the 55CA741 Into Your Build
This selector drops into any standard AR-15 lower receiver that follows the mil-spec pattern, which covers the vast majority of rifles and pistols out there, including popular options like the M&P 15. Keep in mind it ships as the selector lever only, so if you're building a lower from scratch you'll want a detent and spring on hand to complete the install. Swapping one in is a quick job with a punch and a little care around that spring under the pistol grip.
CMMG has spent years earning a reputation for turning out clean, well-finished parts, and this selector fits right in with that track record. Whether you're finishing a first build or freshening up a workhorse rifle, it's a dependable pick that won't overcomplicate things.
Key Specifications
- Manufacturer: CMMG
- Manufacturer Part Number: 55CA741
- UPC: 815835014791
- Type: Single-Sided Safety Selector
- Positions: Safe / Fire (2-position)
- Throw: Standard 90-degree
- Material: Steel
- Finish: Parkerized Black
- Specification: Meets or exceeds mil-spec
- Compatibility: Standard AR-15 lower receivers
- Warranty: CMMG Lifetime Quality Guarantee
What’s Included
- CMMG AR-15 single-sided safety selector lever
Frequently Asked Questions
Does the CMMG AR-15 Safety Selector come with a detent and spring?
No, this part ships as the safety selector lever only. If you're building a lower from scratch or your original detent and spring are worn, you'll want to grab those separately. They're inexpensive and easy to find, so it's a quick add to the order.
Will this safety selector fit my AR-15?
It's built to mil-spec, so it drops into standard AR-15 lower receivers, which covers the vast majority of rifles and pistols on the market. That includes popular platforms like the M&P 15. If your lower follows the standard AR-15 pattern, this will fit.
Is the CMMG 55CA741 an ambidextrous selector?
No, this is the single-sided version with a lever on the left side of the receiver only. If you shoot left-handed or want to run the safety from both sides, CMMG makes a separate ambidextrous model. This standard unit is the classic setup most rifles ship with.
How hard is it to install this safety selector?
It's a straightforward job for anyone comfortable working on a lower. You insert the selector from the left side with the lower in the fire position, then set the detent and spring under the pistol grip. Just keep a finger on that spring so it doesn't launch, and always run a function check before use.




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