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to provide a fast, secure, and enjoyable experience. by Assen, from MN, United States Asked on March 10, 2022
The Aero Precision M4E1 Threaded 8in .300 Blackout Complete Upper Receiver handguard has an internal diameter of 1.3". So a 30 caliber suppressor with an external diameter less that 1.3" that has 5/8x24 threads will fit this upper.