
FIREARMS
At Circle M Spring, we manufacture high quality, precise engineered components for the firearm industry. CMS holds a cage code with the Federal Government, as we supply various
components to the US Military. From Buffer Tubes, Trigger Springs, QD Swivels, Pins
and more. Our team is highly proficient in the needs of this industry and able to work with designers to perfect each element.




Buffer Tube

Magazine Springs

AR Handguard

Miscellaneous Barrel Components

QD Swivels

Firearm Spring & Pin Kit

Firearm Pin Kit

AR Rail

QD Scope Mount
Capabilities (not limited to)
-
Action Spring
-
Bolt Catch Spring
-
Buffer Retainer Spring
-
Buffer Tube
-
Car Action Spring
-
Charging Handle Latch & Spring
-
Cover Spring
-
Detent Take Down Spring
-
Disconnector
-
Ejection Port Cover Door
-
Ejector Spring
-
Extractor Spring
-
Front Slight Spring
-
Gas Ring/Bolt
-
Hammer Spring
-
Handguard
-
J-Wire
-
Magazine Catch Spring
-
Plunger Spring
-
QD Swivel
-
QD Scope Mount
-
Rail
-
Receiver End Plate
-
Trigger Spring
Materials (not limited to)
-
70-75 Aluminum
-
Cold Roll Steel
-
Stainless Steel
Finishes
(secondary services - not limited to)
-
Anodizing
-
Hydro-Dip
-
Black Oxide
-
Gold Irridite
-
Paint
-
Rubber
-
Zinc
-
Passivation
-
Plating