CMMG Upper Pins and Springs Parts KIT - 55AFF2F
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CMMG
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
August 2026 on GunPartPicker
CMMG Upper Pins and Springs Parts KIT - 55AFF2F ranked #29 of the 58 buffer springs builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since March 2026. All time, it ranks #28 of the 90 buffer springs builders have added.
It was in stock most days in August 2026, and today 6 of the 8 retailers we track have it in stock. The best price drifted down from $12.47 to $11.95 over August 2026 without a real sale. Buying today, the lowest price is $11.95 at Classic Firearms, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
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Read the guide: AR-15 Buffer Spring Guide →Frequently Built With
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Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
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