The Colt Plunger Spring For Colt AR15A4 is a genuine factory replacement component designed to keep your rifle’s forward assist system running smoothly. Built to Colt’s exact specifications, this compact coil spring provides the proper tension for the plunger in AR-15 and M16 pattern rifles, helping ensure reliable operation of the forward assist and receiver assembly over thousands of rounds.

This dedicated plunger spring is compatible with a wide range of Colt AR-15 models, including Accurized HBAR, Government Carbine, Match Target variants, and AR-15/M4 configurations chambered in .223 Remington. Ideal for routine maintenance, repairs, or careful parts stocking, it offers a straightforward drop-in replacement that supports consistent function at the range, in training, or during competition. Backed by Colt’s long-standing reputation for precision manufacturing and dependable performance, this small part plays an important role in keeping your rifle running as intended.

• Manufacturer: Colt
• Model: AR-15, M16, AR-15/M4
• Type: Forward Assist / Receiver Part
• Fits: Multiple Colt AR-15 variants including Accurized HBAR, Government Carbine, and Match Target models
• Delivery Weight: 0.005 kg
• Shipping Width: 83 mm
• Shipping Length: 146 mm