Answers for Does this 410 upper require a specific buffer spring?

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International Firearm Corporation Gun Parts International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail Q&A Question - Does this 410 upper require a specific buffer spring? International Firearm Corporation Gun Parts AR 15 Parts AR15 Upper Receivers International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail Q&A Question - Does this 410 upper require a specific buffer spring? International Firearm Corporation Gun Parts Rifle Parts AR 15 Parts AR15 Upper Receivers International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail Q&A Question - Does this 410 upper require a specific buffer spring? International Firearm Corporation Gun Parts AR 15 Parts International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail Q&A Question - Does this 410 upper require a specific buffer spring? International Firearm Corporation Gun Parts Rifle Parts AR 15 Parts International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail Q&A Question - Does this 410 upper require a specific buffer spring? International Firearm Corporation Gun Parts Rifle Parts International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail Q&A Question - Does this 410 upper require a specific buffer spring?

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International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail

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Answered by Marr, member, from AL, United States, on October 22, 2019

No. This upper fits perfectly on any mil-spec AR15 lower with a carbine buffer spring. Included with the IFC upper is a proprietary buffer that is to be installed, replacing the original carbine buffer.

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International Firearm Corporation Gun Parts International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail Q&A Question - Does this 410 upper require a specific buffer spring? International Firearm Corporation Gun Parts AR 15 Parts AR15 Upper Receivers International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail Q&A Question - Does this 410 upper require a specific buffer spring? International Firearm Corporation Gun Parts Rifle Parts AR 15 Parts AR15 Upper Receivers International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail Q&A Question - Does this 410 upper require a specific buffer spring? International Firearm Corporation Gun Parts AR 15 Parts International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail Q&A Question - Does this 410 upper require a specific buffer spring? International Firearm Corporation Gun Parts Rifle Parts AR 15 Parts International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail Q&A Question - Does this 410 upper require a specific buffer spring? International Firearm Corporation Gun Parts Rifle Parts International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail International Firearm Corporation Ifc Upper Receiver .410 2.5" 18.5" 9rd Flip-up Sights/rail Q&A Question - Does this 410 upper require a specific buffer spring?

Last updated 2025-11-12 UTC.