CMMG

CMMG Upper Pins and Springs Parts Kit - 55AFF2F

CMMG Upper Pins and Springs Parts Kit - 55AFF2F - Buffer Spring for AR-15 - view 1
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Overview

The CMMG Upper Pins and Springs Parts Kit is designed specifically for AR-15 builds chambered in 5.56 NATO, providing essential components for proper assembly and function. This kit includes all necessary pins and springs to ensure that your upper receiver operates smoothly and reliably, which is critical for maintaining accuracy and performance in your firearm. You’ll commonly find this parts kit in various AR-15 builds focused on reliability and consistent performance.

Specifications

MPN55AFF2F
PlatformAR-15
AssemblyParts Kit

Available Merchants(7)

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Classic Firearms
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Palmetto State Armory
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GritR Sports
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Optics Planet
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Brownells
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Frequently Built With

Based on build data

Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Platform

80.8%
AR-1580.8%
AR-1017.7%
AR-91.5%

Caliber

66.9%
5.56 NATO66.9%
.223 Wylde13.2%
300 Blackout7.1%
.308 Win4.5%
.450 Bushmaster2.3%
Other6%

Gas System

44.1%
Mid-Length44.1%
Carbine27.9%
Rifle17.5%
Pistol9.2%
Blowback0.4%
Other0.8%
Frequently Built With Products
ProductCategoryTimes Built Together
Law Tactical AR Folding Stock Adapter Gen 3 - HKStock Adapter71
Strike Industries Extended Bolt CatchBolt Catch67
Strike Industries Cobra Billet Aluminum Trigger Guard - RedTrigger Guard49
Wilson Combat Ar-15 Lo-Profile Gas Block .750" BlackGas Block48
Strike Industries AR-10 Shift Pins, Black - SI-AR10-SHIFT-BKTakedown Pin47
Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod CCharging Handle46
Build Platform Breakdown
PlatformPercentage
AR-1580.8%
AR-1017.7%
AR-91.5%
Build Caliber Breakdown
CaliberPercentage
5.56 NATO66.9%
.223 Wylde13.2%
300 Blackout7.1%
.308 Win4.5%
.450 Bushmaster2.3%
6mm ARC1.9%
.458 SOCOM1.1%
7.62x39mm1.1%
6.5 Grendel1.1%
9mm0.4%
.224 Valkyrie0.4%
Build Gas System Breakdown
Gas SystemPercentage
Mid-Length44.1%
Carbine27.9%
Rifle17.5%
Pistol9.2%
Blowback0.4%
Intermediate0.4%
Proprietary0.4%

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