Sharps Bros Overthrow 5.56 NATO Custom AR-15 Rifle – Billet Spartan Receiver, BCM MCMR-15 Handguard, Ambidextrous Controls
This Sharps Bros Overthrow is a purpose-built 5.56 NATO AR-15 assembled on a billet receiver set carved with the brand’s signature Spartan helmet motif. A BCM MCMR-15 free-float handguard, ambidextrous controls, and a crisp flat-blade trigger give the rifle features shooters usually add later, while the SureFire-style MB-556 muzzle brake and adjustable stock keep it range-ready right out of the box.
Condition
Overall Condition: Good – shows signs of prior use and handling.
Bore Condition: Excellent – clean, mirror finish, no signs of wear.
Rifling Condition: Excellent – sharp lands and grooves.
Specific Condition Notes: Scratches and blemishes are present on exterior surfaces.
What’s Included
- Sharps Bros Overthrow 5.56 NATO custom AR-15 rifle
- Low-profile flip-up front sight (installed)
- Low-profile flip-up rear sight (installed)
- Magpul MOE M-LOK vertical foregrip (installed)
- One 30-round Magpul PMAG magazine
The Overthrow billet receiver set is machined from 7075-T6 aluminum and finished in black hard-coat anodizing. Its sculpted Spartan helmet magwell is both visually striking and functional, offering an enlarged opening for faster magazine changes.
A BCM MCMR-15 free-float handguard provides 15 inches of continuous M-LOK slots and a full-length top rail. The slim profile keeps weight down while maintaining rigidity for consistent accuracy.
Fully ambidextrous controls include a Radian-style charging handle and dual safety selectors, making the rifle equally accessible to left- and right-handed shooters. The flat-blade single-stage trigger delivers a crisp break for precise shot placement.
The 16-inch barrel is threaded and fitted with a two-port MB-556 muzzle brake that helps reduce recoil and muzzle rise. A six-position collapsible stock sets an 11-inch length of pull, and a Hogue OverMolded rubber grip offers secure, comfortable handling.