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
Available Merchants(7)
Prices checked
Price Alert
September 2026 on GunPartPicker
CMMG Upper Pins and Springs Parts KIT - 55AFF2F ranked #33 of the 57 buffer springs builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since March 2026. All time, it ranks #26 of the 107 buffer springs builders have added. Builds with this buffer spring are split between 300 Blackout (40%) and 5.56 NATO (40%), mostly on mid-length gas (67%, then pistol-length 33%), and nearly all AR-15.
It was in stock most days in September 2026, but today 3 of the 7 retailers we track have it in stock. The best price crept up from $11.95 to $13.99 over September 2026. Buying today, the lowest price is $11.95 at Classic Firearms, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by the builds that include this one
Phase 5 Tactical AR-15 90 Degree Ambi Safety Selector Black
Magpul AR-15 MOE Enhanced Trigger Guard FDE
Strike Industries Extended Bolt Catch
Wilson Combat AR-15 Lower Receiver Forged
Timber Creek Outdoors AR-15 Takedown Pin Set - Red
CMMG AR-15 Carbine Buffer Assembly - 55CA977
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use 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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