Answers for Is this upper compatible with a foxtrot Mike fm9 lower receiver?

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Stern Defense + Gun Parts Stern Defense Gun Parts Stern Defense AR-15 6 inch Assembled 9mm Upper Receiver w/ 8 inch MLOK Rail Stern Defense AR-15 6 inch Assembled 9mm Upper Receiver w/ 8 inch MLOK Rail Q&A Question - Is this upper compatible with a foxtrot Mike fm9 lower Stern Defense + Gun Parts Stern Defense Gun Parts + AR 15 Parts Stern Defense AR15 Parts + AR15 Upper Receivers Stern Defense AR15 Upper Receivers Stern Defense AR-15 6 inch Assembled 9mm Upper Receiver w/ 8 inch MLOK Rail Stern Defense AR-15 6 inch Assembled 9mm Upper Receiver w/ 8 inch MLOK Rail Q&A Question - Is this upper compatible with a foxtrot Mike fm9 lower Stern Defense + Gun Parts Stern Defense Gun Parts + Rifle Parts Stern Defense Rifle Parts + AR 15 Parts Stern Defense AR15 Parts + AR15 Upper Receivers Stern Defense AR15 Upper Receivers Stern Defense AR-15 6 inch Assembled 9mm Upper Receiver w/ 8 inch MLOK Rail Stern Defense AR-15 6 inch Assembled 9mm Upper Receiver w/ 8 inch MLOK Rail Q&A Question - Is this upper compatible with a foxtrot Mike fm9 lower Stern Defense + Gun Parts Stern Defense Gun Parts + AR 15 Parts Stern Defense AR15 Parts Stern Defense AR-15 6 inch Assembled 9mm Upper Receiver w/ 8 inch MLOK Rail Stern Defense AR-15 6 inch Assembled 9mm Upper Receiver w/ 8 inch MLOK Rail Q&A Question - Is this upper compatible with a foxtrot Mike fm9 lower Stern Defense + Gun Parts Stern Defense Gun Parts + Rifle Parts Stern Defense Rifle Parts + AR 15 Parts Stern Defense AR15 Parts Stern Defense AR-15 6 inch Assembled 9mm Upper Receiver w/ 8 inch MLOK Rail Stern Defense AR-15 6 inch Assembled 9mm Upper Receiver w/ 8 inch MLOK Rail Q&A Question - Is this upper compatible with a foxtrot Mike fm9 lower Stern Defense + Gun Parts Stern Defense Gun Parts + Rifle Parts Stern Defense Rifle Parts Stern Defense AR-15 6 inch Assembled 9mm Upper Receiver w/ 8 inch MLOK Rail Stern Defense AR-15 6 inch Assembled 9mm Upper Receiver w/ 8 inch MLOK Rail Q&A Question - Is this upper compatible with a foxtrot Mike fm9 lower

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Stern Defense AR-15 6 inch Assembled 9mm Upper Receiver w/ 8 inch MLOK Rail

$470.45 $460.45 Save $10.00

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Answered by Tom B, Gear Expert, from IL, United States, on August 24, 2021

It should be compatible, yes.

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