The CMMG AR-15 Lower Pins and Springs Parts Kit (brand part no. 55AFF75) is built for the moment a spring goes flying or a small lower part disappears. It collects the small hardware an AR-15 lower uses in one package, which is handy to keep on the bench for spares. CMMG states that all parts meet or exceed mil-spec. Takedown pins are not included.

Key Specifications

• The kit includes hammer and trigger springs.
• It includes hammer and trigger pins.
• It includes a safety selector detent and spring.
• A buffer retainer and spring are included.
• A trigger guard roll pin is included.
• It includes takedown detents and springs, though the takedown pins themselves are not included.
• A disconnector spring is included.
• It includes a bolt catch roll pin and a bolt catch spring and plunger.
• All parts meet or exceed mil-spec, per CMMG.

Frequently Asked Questions

Does it include takedown pins? No. The kit includes takedown detents and springs, but the takedown pins are not included.

What is in the kit? It includes hammer and trigger springs, hammer and trigger pins, a safety selector detent and spring, a buffer retainer and spring, a trigger guard roll pin, takedown detents and springs, a disconnector spring, a bolt catch roll pin, and a bolt catch spring and plunger.

Is it good for spares? CMMG says it is great to have for spares or for replacing small lower receiver parts that go missing.

Buy the CMMG AR-15 Lower Pins and Springs Parts Kit

Keep this kit on the bench and the next lost spring or pin will not stop your build. Order it from our Lubbock, Texas shop for fast, insured shipping, and see our other small AR-15 parts.