AR-15 MK3 Action Spring - AR-15 Action Spring
CMMG
Overview
The CMMG AR-15 MK3 Action Spring - AR-15 Action Spring is a buffer spring. Compare prices from multiple merchants and find the best deal.
Specifications
Available Merchants(4)
Prices checked
Price Alert
Build history on GunPartPicker
Builders on GunPartPicker first added the CMMG AR-15 MK3 Action Spring - AR-15 Action Spring to a build in June 2026.
It was out of stock everywhere we track for all of September 2026, and today 2 of the 4 retailers we track have it in stock. Buying today, the lowest price is $5.95 at CMMG.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
Not sure which buffer spring to pick?
We ranked every buffer spring by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Buffer Spring Guide →Check it against the live catalog:
Frequently Built With
Popular alongside buffer springs on GunPartPicker
Wilson Combat AR-15 Lower Receiver Forged
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Strike Industries Ambidextrous Magazine Release, Black - ARAMBIMRBK
Wilson Combat AR-15 Starburst Gunfighter Pistol Grip Black
CMMG AR-15 Carbine Buffer Assembly - 55CA977
CMMG AR-15 HD Pivot and Takedown Pin Parts KIT - 55AFF3B
No reviews yet. Be the first to review this product!