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CMMG
AR-15/M16 LOWER SPRING KIT

815835011974 100012715

Description
Ratings (6)

17 Critical Parts For Your Lower

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).

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Customer ratings for CMMG AR-15 LOWER PIN & SPRING KIT

Number of ratings: 6
From brownells.com: 6
Average rating: 3.3

Missing descriptions (24/03/2014)

This is a great kit that has everything you may need in a build. Biggest drawback is there is no paperwork describing the components and their relationship. In other words - which spring goes where? It would have been nice to have a document showing all the components and their descriptor.

Read the fine print (30/05/2014)

Make sure you read the fine print- the mag catch spring is not included. Other parts were acceptable, just don't make the same mistake I made. This is NOT A COMPLETE SPRING KIT.

Parts Dont Meet Spec (26/10/2016)

Most parts worked fine in the build, however the selector detent is to large and will not fit in any AR lower. It measures a diameter of .1235, whereas it should be .1205, otherwise it is to large and will not work.

Know what you're buying (24/01/2017)

Just be aware this is not a complete kit to finish off your lower build. I didn't have the need to use all the parts in this kit. What I did use works fine and it went into a Poly FMK lower build I completed. No issues with parts being out of spec. The spring not included in this kit was the magazine release spring. I knew where the parts went but there is no documentation with this kit so you got to do some research if your not sure what goes where.

Works (19/10/2017)

This kit is great if your looking for all the small springs for the lower and not expensive.

Better than the average parts kits (22/03/2018)

Now that Bushmaster and DPMS are sharing parts and tooling and some of their parts like their AR-10 bolt release pin or screw are made probably from imported pewter I can't buy from them anymore, The great Remington/Freedom Group co-op ruined Bushmaster and are on their way to messing up DPMS bad... quality is suffering over the old days. CMMG makes their parts in house according to two different guys that work the floor their. When I couldn't get a replacement bolt catch screw that broke on my Bushmaster AR-10 from either Bushmaster or DPMS, I called CMMG for help and the guy on the phone didn't trash the other companies but agreed with me that some parts quality seemed to be suffering. He mailed me three bolt catch screws... for free, and only asked that I consider doing business with them in the future. You don't get that every day with many companies,

Read 6 more ratings on brownells.com

22.9 22.9 1 GBP

Product no.: 100012715
CMMG AR-15 LOWER PIN & SPRING KIT
Mfr Part: 55AFF75 815835011974 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

22.9 GBP 83 £22.90 *

Delivery time approx. 7-14 days.
More than 10 pieces in USA warehouse

Specs: Make: AR-15

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Top takeaways

The kit includes 17 essential pins and springs for AR-15 lower receiver assembly or replacement.
Components such as trigger and hammer springs, pins, detents, and safety selector parts are part of the kit.
Manufactured by CMMG, it is a convenient package for building or maintenance of AR-15 lowers.

Attributes

Make: AR-15 Delivery weight: 0.045kg Shipping height: 8mm Shipping width: 104mm Shipping length: 164mm UPC : 815835011974

Item details

Made in USA

Upgrade your AR-15 with the CMMG Lower Spring Kit! 🛠️ 17 essential parts for smooth assembly and quick replacements.

Description
Ratings (6)