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AR-15 Lower Pin & Spring Kit
AR-15 Lower Pin & Spring Kit
AR-15 Lower Pin & Spring Kit
AR-15 Lower Pin & Spring Kit
None
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CMMG - AR-15 Lower Pin & Spring Kit

15 Reviews
AR-15 Lower Pin & Spring Kit
Brownells #
100012715
MFR #
55AFF75
UPC
815835011974
$12.49
Coupon Code
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Specifications
Make Model Fit:
AR-15.Universal
Restriction
Gun Part Restrictions:
Yes
Prop 65 restriction:
Warning! Cancer and Reproductive Harm. Www.p65warnings.ca.gov
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What is the CMMG - AR-15 Lower Pin & Spring Kit?

Parts kit contains 17 essential pins and springs for your AR lower receiver. Saves time when assembling components for a build and makes a great emergency replacement kit for small parts that are most often lost or broken.

  • Trigger Spring
  • Hammer Spring
  • 2 Hammer Trigger Pins
  • 2 Takedown Springs
  • Disconnector Spring
  • Safety Selector Detent
  • Safety Selector Spring
  • Bolt Catch Spring
  • Bolt Catch Plunger
  • Bolt Catch Coil Pin
  • Trigger Coil Pin
  • Buffer Retainer Spring
  • Buffer Retainer
  • Takedown Detent


SPECS: Kit contains: trigger spring, hammer spring, hammer & trigger pins (2), takedown detent springs (2), disconnector spring, safety selector detent, safety selector spring, bolt catch spring, bolt catch plunger, bolt catch pin, triggerguard pin, buffer retainer, buffer retainer spring, & takedown detents (2).


See all of our AR15s and AR15 parts here.

Gun Part Restriction
Gun Parts have restricted shipping to CA.

Prop 65WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

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AR-15/M16 LOWER SPRING KIT REVIEWS

4.3
15 Reviews
5 Stars
73%
4 Stars
7%
3 Stars
7%
2 Stars
7%
1 Stars
7%
Reviews Summary
The AR-15/M16 Lower Spring Kit offers a solid collection of components that generally fit well and serve as reliable spare parts. While the kit provides great value, some users noted missing springs like the magazine catch and a lack of documentation for assembly. Quality varies, and customer service is highlighted positively by those needing support.
What Reviewers Are Saying
Product Quality
70%
Many reviewers appreciated the overall quality of the parts in the kit, with most components described as fitting well and functioning correctly. However, a few issues were mentioned regarding specific parts not working, such as the oversized selector detent. Overall, product quality earned a favorable consensus.
Value for Money
60%
Reviewers frequently highlighted the affordable price of the spring kit, considering it good value for the assortment of parts provided. Users noted that having spare parts on hand is a practical investment, particularly for those involved in building AR platforms.
Missing Components
50%
Several reviews pointed out that the kit is not complete, lacking critical parts like the magazine catch spring. This omission caused frustration for some customers, making them feel misled if they expected a comprehensive kit. Clear labeling of included parts would enhance user experience significantly.
Instructions and Documentation
40%
A common concern among users was the lack of documentation included with the kit describing the parts or their installation. Reviewers expressed the need for a guide or paper that could help users understand the components and their applications better.
Customer Service
30%
Positive feedback highlighted the responsive and helpful customer service provided by CMMG, especially in resolving issues related to component quality. Customers appreciated the support provided when constituents did not meet expectations, making them more inclined to trust the brand.
5
Good to have in my “if needed” AR stuff…
You know how easy them there little springs can escape into the great unknown never to be seen again on this side of life, so I try to keep several unopened packets of their springy a$$ed little kinfolk around just in case one runs away never to be seen again…I needed an unopened new pack to add to my emergency parts stash and this one fit my needs and wants. Brownell’s carries good stuff so I ordered one of the spring packs and it fits my needs to a tee at a fair price.
Would you recommend this? Yes, I would recommend to a friend
by Charles Williams on December 12, 2025
Verified Purchase
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5
Good PK
Great parts kit. I needed a few extra parts to keep in my box for builds and repairs. I would highly recommend grabbing this kit to keep on hand.
Would you recommend this? Yes, I would recommend to a friend
by PW on April 26, 2025
Was this review helpful? 0
5
Just what I needed
I am always working on builds, upgrades, and maintenance on my builds, I needed this parts kit in a pinch. After installation and testing, zero issues.
Would you recommend this? Yes, I would recommend to a friend
by PW on April 17, 2025
Was this review helpful? 0
5
Good kit
It's a parts kit. Shipped quick as always and arrived in 1 pc.
Would you recommend this? Yes, I would recommend to a friend
by TIM STILWELL on January 24, 2025
Verified Purchase
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5
Great kit
Seems kind of hard to mess up a lower spring kit. This kit has all the appropriate parts, and it installs like its designed to do.
by GABRIEL RALEY on May 17, 2024
Verified Purchase
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View All 15 Reviews
Customer Questions
0 Questions