CMMG 55CA9D7 Receiver Extension MK4 Black Steel AR Platform

Non-firearm items ship straight to your address — no FFL transfer is required.

Shipping is calculated at checkout. Local pickup is always available right here in Carthage.

Non-firearm items may be returned in new, unused condition. Just contact us first so we can guide you through it.

Defective items covered under manufacturer warranty are handled directly with the manufacturer for service and repair.

Questions about any of this? Call us at (417) 358-5700 — see our Store Policies for full details.