Spikes Tactical ST15 .300 AAC Blackout AR Pistol – 10.5" Stainless Barrel, SilencerCo ASR Brake, Sightmark Optic & Laser, SBA3 Brace
This custom Spikes Tactical ST15 pairs a purpose-built .300 AAC Blackout upper with premium upgrades that enhance control, accuracy, and accessory flexibility. A 10.5 inch stainless, threaded barrel capped by a SilencerCo ASR muzzle brake keeps recoil flat while offering fast suppressor compatibility. The package ships ready to shoot with a Sightmark Ultra-Shot R-SPEC red/green dot optic, a Sightmark LoPro green-laser/white-light module, and two 20-round Magpul PMAGs marked for 300 BLK.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent – Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling – Sharp lands and grooves.
This firearm presents only minor, superficial scratches and small blemishes consistent with careful handling. The bore remains bright and sharp.
What’s Included
- Sightmark Ultra-Shot R-SPEC reflex sight (red/green dot) with factory box
- Sightmark LoPro combination green-laser / white-light module
- SilencerCo ASR muzzle brake (installed)
- 2 × 20-round Magpul PMAG GEN M3 magazines marked “300 Blackout”
The stainless 10.5 inch barrel is free-floated inside a 9-inch aluminum quad-rail handguard, giving ample M1913 rail space for lights, lasers, and other mission-specific gear. The hard-coat anodized upper matches the forged ST15 lower, which features color-filled selector pictograms and the signature red spider logo.
An extended, ambidextrous Sons of Liberty charging handle makes clearing and charging easy from either side, while the Spikes Tactical full-auto-rated bolt-carrier group ensures smooth, reliable cycling under demanding conditions.
At the rear, an SB Tactical SBA3 five-position adjustable brace offers compact storage and comfortable shouldering. The brace includes a QD sling mount, complementing the integral QD cup on the handguard for flexible sling placement.
The SilencerCo ASR brake uses standard 5/8-24 threads, so shooters can run the pistol unsuppressed with excellent recoil management or add any ASR-compatible suppressor without tools. Chambered in .300 AAC Blackout, the platform maximizes ballistic performance from the compact barrel, especially with subsonic loads.