Aero Precision M4E1 6.8 SPC II AR-15, 16 in Threaded Barrel, Free-Float M-LOK, FDE Cerakote, Magpul STR, Radian Raptor, SIG Buckmasters Scope, Burris FastFire 3
This custom-configured Aero Precision M4E1 stands out with its 6.8 SPC II chambering, two-tone FDE Cerakote finish, and a feature-rich AR-15 build. It pairs a 16-inch threaded barrel and free-float M-LOK handguard with an ambidextrous Radian Raptor charging handle and Magpul STR stock. It comes installed with a SIG Sauer Buckmasters variable riflescope and a Burris FastFire 3 micro red dot.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are numerous scratches and blemishes present on exterior surfaces. The magazine release is fixed for compliance; the magazine cannot be removed, and the upper must be opened to load the rifle. The Burris FastFire 3 red dot is missing its battery cap and its function could not be verified; it is sold as is.
What’s Included
- SIG Sauer Buckmasters variable riflescope with SIG mount (installed)
- Burris FastFire 3 micro red dot on rail riser (installed)
- Radian Raptor ambidextrous charging handle (installed)
- Magpul STR adjustable carbine stock (installed)
- M-LOK polymer vertical foregrip (installed)
- M-LOK QD sling socket on handguard (installed)
- 1x 10-round magazine (marked "ROLLERMAG")
Built on Aero Precision’s forged 7075-T6 aluminum receivers, this M4E1 uses a flat-top upper with forward assist and ejection port cover. The rifle is configured for 6.8 SPC II and features a 16-inch barrel with a threaded muzzle and open-slot flash hider. The action is semi-automatic, direct impingement, with a manual safety/selector.
The free-float aluminum M-LOK handguard provides a continuous Picatinny top rail and an ATLAS-style two-screw wedge clamp. Installed accessories include an M-LOK polymer vertical foregrip and an M-LOK QD sling socket. This setup delivers ample rail space and modern mounting interfaces across the top and sides.
Ergonomics are enhanced by a Magpul STR adjustable carbine stock in FDE and a matching Magpul polymer pistol grip. The stock offers an 11–14 inch length of pull range. A Radian Raptor ambidextrous charging handle is installed for bilateral manipulation.
The rifle wears a two-tone earth-tone FDE Cerakote on the receivers and handguard, contrasted by a black barrel and small parts. Markings include "MOD M4E1" and "CAL MULTI" on the lower and "Aero Precision LLC / Tacoma, WA" manufacturer roll mark. Capacity is 10+1 with a RollerMag-pattern 10-round magazine body. Optics installed include a SIG Sauer Buckmasters variable riflescope with SIG mount and a Burris FastFire 3 micro red dot on a riser.