Q&A for FM Products FM-45 AR .45 Upper Receiver w/ Micro Brake — 9 Questions & 7 Answers

The FM Products FM-45 AR .45 Upper Receiver w/ Micro Brake should work with a Mil-Spec lower even though it is recommend to use a pistol lower that accepts Glock .45 ACP magazines. Foxtrot Mike states that the Stern Magwell adapters are not compatible with their uppers and from what information I could find they are the only ones that make a .45 ACP mag well adapter. I recommend contacting Foxtrot Mike to see what .45 ACP mag well adapter they recommend.

Yes, this FM Products FM-45 AR .45 Upper Receiver w/ Micro Brake is a forward charging upper receiver. We also carry the 16" barrel version which can be found by using the link below:
https://www.opticsplanet.com/fm-products-fm-45-ar-45-forward-charging-upper-reciever-w-flash-supressor.html

The manufacturer does not state how much if any of the barrel threads extend past the handguard on the FM Products FM-45 AR .45 Upper Receiver w/ Micro Brake. From some information I could find the barrel threads seem to be partially covered by the handguard and the handguard has an internal diameter of 1.3". So you may be able to attach a suppressor if the outside diameter is less than that.

The FM Products FM-45 AR .45 Upper Receiver w/ Micro Brake utilizes an 8.5" barrel chambered in .45 ACP.

The FM Products FM-45 AR .45 Upper Receiver w/ Micro Brake will require a buffer tube and buffer assembly.

Yes it is.