The CMMG Rifle Buffer Spring (CMMG part no. 55CA93F) is a direct-fit replacement buffer spring built for the AR15 action. The buffer spring drives the bolt carrier group forward after each cycle and absorbs recoil energy, so a weak or worn spring can lead to short-stroking, failure to lock back, or inconsistent cycling. CMMG builds this spring to factory specifications for a straightforward drop-in replacement.

Key Specifications

• Built specifically for the AR15 action.
• Functions as the rifle buffer spring, driving the bolt carrier group forward each cycle.

Frequently Asked Questions

What platform does this buffer spring fit? The AR15 action.

What symptoms suggest I need a new buffer spring? Short-stroking, failure to lock back, or otherwise inconsistent cycling can point to a weak or worn spring.

Buy the CMMG AR15 Rifle Action Buffer Spring

A tired buffer spring is an easy, inexpensive fix, and this CMMG factory-spec replacement restores consistent cycling. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and browse our full AR buffer system selection.