Aero Precision EPC-9 9mm AR-9 Semi-Auto Rifle, 17.25 in Threaded Barrel, 31+1, Free-Float M-LOK, B5 Systems Stock
This Aero Precision EPC-9 stands out as a purpose-built AR-9 in 9mm Luger with a 17.25 in threaded barrel and an installed multi-port brake/comp. It uses Glock-pattern double-stack magazines and incorporates the EPC-series last-round bolt hold open system. Durable 7075-T6 aluminum receivers with Type III hardcoat anodizing, a free-float M-LOK handguard with a continuous top Picatinny rail, and a B5 Systems adjustable carbine stock round out a well-appointed build.
Receiver markings include "MOD EPC-9 / CAL MULTI" and "AERO PRECISION / LAKEWOOD, WA," with the stylized Aero "A" logo on the magwell and an "A" forging/inspection mark on the left rear of the upper. The AR-pattern upper features a shell deflector and an ejection-port cover engraved "GET STERN" externally and "9MM" internally. Controls include a paddle-style magazine release and a manual safety selector.
The straight blowback action is paired with a free-floated aluminum M-LOK handguard and a continuous top Picatinny rail across the receiver and handguard for mounting accessories. An installed polymer M-LOK vertical foregrip provides additional front-end control. The B5 Systems adjustable carbine stock offers a stated length of pull of 12.25 in, and a textured polymer pistol grip is fitted.
Capacity is 31+1 when using the included extended 31-round Glock-pattern magazines. The bore condition is excellent, with sharp lands and grooves, supporting the rifle’s clean overall presentation.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are minimal handling marks from prior use. The bore is bright and clean.
What’s Included
- Aero Precision EPC-9 9mm semi-automatic rifle
- 2x 31-round Glock-pattern 9mm double-stack magazines (stamped "9mm" at the feed lips)
- Polymer M-LOK vertical foregrip (installed)
- Multi-port muzzle brake/compensator (installed)
- B5 Systems adjustable carbine stock (installed)




