Aero Precision M5E1 .308 Win Semi-Auto Rifle, 20" Barrel, 15" M-LOK Handguard, Fixed Stock – 20+1 Capacity
The Aero Precision M5E1 pairs a 20-inch 4150 CMV barrel with a slick-side enhanced upper to deliver a lighter, smoother-handling AR-10 platform. Its free-float 15-inch M-LOK handguard, rifle-length gas system, and fixed rifle stock work together for balanced recoil control and consistent accuracy. Built on black anodized 7075-T6 receivers and accepting SR-25 / LR-308 magazines, this .308 Winchester rifle offers a dependable, modern solution for distance work or general-purpose use.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Good – Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling – Intact, well-defined lands and grooves.
This rifle has a few minor surface scratches and blemishes consistent with careful handling, but no signs of harsh use.
What’s Included
- Aero Precision M5E1 .308 Win rifle
- 2 × 20-round steel SR-25 pattern magazines
- 3 × 10-round Magpul PMAG LR/SR Gen M3 polymer magazines
Built around the proven direct-impingement system, the M5E1 uses a rifle-length gas tube for smoother cycling and reduced felt recoil. The 20-inch barrel’s 1:10 twist stabilizes a wide range of .308 Winchester and 7.62 NATO loads, while the 5/8-24 threaded muzzle is ready for brakes or suppressors.
The enhanced upper eliminates the forward assist for a streamlined profile. Its integrated barrel-nut/handguard interface adds strength and simplifies assembly, and the continuous Picatinny top rail lines up perfectly from receiver to handguard for uninterrupted optic or accessory placement.
A 15-inch free-float aluminum handguard offers full-length M-LOK slots for mounting lights, bipods, or other gear without adding bulk. The rifle-length fixed stock delivers a 14-inch length of pull that suits most shooters and maintains a classic, solid feel.
Maintenance is simplified by threaded bolt-catch and takedown detent recesses, while the black anodized finish on 7075-T6 aluminum receivers resists corrosion and hard use. Standard controls, including a manual safety and magazine release, keep operation familiar and intuitive.