Menu Products AR-15/M16/M4 Parts Shop AR-15/M16/M4 Parts Shop CSS designs, manufactures and markets many components for the AR-15/M16/M4 family of modern sporting rifles. These are high quality OEM parts suitable for new build, as well as replacement needs. All are manufactured in the USA. Please see the table below for a list of available parts. Contact us to receive specific quantity and pricing information. Action Spring Auto Sear Assembly Bolt Catch Spring Buffer Retainer Spring Car Action Spring Charging Handle Latch Charging Handle Latch Spring Cover Spring Detent Take Down Spring Disconnector Disconnector Spring Ejection Port Cover Door Ejector Spring (Selector Spring) Extractor Spring Front Sight Spring Gas Ring, Bolt Gas-Ring-308 Hammer Spring 2 (Semi Auto Only) Hammer Spring (3rd Burst or Full Auto) Handguard Cap Handguard Cap-Grenade Launcher J-Wire Magazine Catch Spring Plunger Spring / Forward Assist Receiver End Plate Sling Swivel Trigger Spring REQUEST OUR PRICING BROCHURE TODAY Send Request We accept Visa, Mastercard, and AMEX For pricing information, please email us. Please visit our Defense & Firearms page to learn more about CSS's experience supporting the firearms and defense industry for over 80 years. You may also submit a Request for Quote or Contact Us with any questions you may have about our firearms component and assembly manufacturing capabilities. Photos Ejection Port Cover .308 Charging Handle Latch Bolt Catch Spring Trigger Spring Gas Ring, Bolt Handguard Cap J-Wire Extractor Spring Disconnector Spring 3rd Burst or Full Auto Hammer Spring 2 (Semi Auto Only) Ejector Spring Selector Spring Front Sight Spring Car Action Spring Music Charging Handle Latch Spring Hammer Spring (3rd Burst or Full Auto) Handguard Cap - Grenade Launcher Magazine Catch Spring Disconnector Cover Spring Buffer Retaining Spring Auto Sear Assembly Plunger Spring / Forward Assist Sling Swivel Gas Ring .308 Disconnector Spring Semi Auto Only Receiver End Plate Detent Take Down Spring Ejection Port Cover .223 Address 48 Spring Lane · Farmington, CT 06032 Phone 860.677.1341 Fax 860.677.7199 Products Capabilities Industries Who We Are Request a Quote Resources Careers Contact Us English 简体中文 Deutsch Français Join our email list Join Follow us © Connecticut Spring & Stamping. All Rights Reserved. This Website Uses Cookies We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners who may combine it with other information that you've provided to them or that they've collected from your use of their services. For more information regarding our policy, please see here. Agree