AR15A4 Key & Bolt Carrier Assembly
Colt
Overview
The Colt AR15A4 Key & Bolt Carrier Assembly is a bolt carrier group. Compare prices from multiple merchants and find the best deal.
Specifications
Price and stock
The Colt AR15A4 Key & Bolt Carrier Assembly was out of stock everywhere we track for all of August 2026, and today the one retailer we track is out of stock. Listed prices start at $124.99 at Brownells for when it comes back.
Trending bolt carrier groups →
Prices checked · refreshed daily across 31 retailers
Not sure which bolt carrier group to pick?
We ranked every bolt carrier group by how often it shows up in real builds on GunPartPicker.
Read the guide: The Most Trusted AR-15 BCGs →Check it against the live catalog:
Frequently Built With
Popular alongside bolt carrier groups on GunPartPicker
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers
Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4
Wilson Combat AR-15 Lower Receiver Forged
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Magpul AFG-2 Angled Fore Grip - Black
Magpul AR-15 MOE Stock Collapsible Mil-Spec Black
No reviews yet. Be the first to review this product!