AR-15 Forward Assist Spring — Model UR-07 | Precision, Mil-Spec Tension | UPC 859819007867
Get your forward assist snapping with crisp, consistent tension. The AR-15 Forward Assist Spring (UR-07) is a small but essential component that powers the forward assist pawl, ensuring reliable engagement when you need to nudge the bolt carrier fully into battery. Engineered to mil-spec dimensions and wound from durable spring steel, this drop-in replacement restores positive feel on worn assemblies and completes new builds with confidence.
Why This Forward Assist Spring
Mil-spec performance: Proper free length and wire diameter provide predictable, repeatable tension for dependable forward-assist function.
Durable spring steel: Heat-treated for long service life, resisting set, fatigue, and corrosion from common gun-care solvents.
Smooth, positive engagement: Helps the forward assist pawl index the carrier teeth cleanly, supporting reliable chambering under adverse conditions.
Drop-in fit: Works with standard AR-15/M4 forward assist assemblies, uppers, and ejection port covers—ideal for new builds, repairs, or spares.
Budget-friendly insurance: A lightweight part that prevents downtime; keep a couple in your range kit or armorer’s box.
Perfect For
Refurbishing high-round-count uppers with mushy or inconsistent forward-assist feel
Duty and training carbines that must function in mud, sand, rain, or cold
Builders & armorers stocking critical small parts for fast turnarounds
Quick Install Guide (Best Practices)
Verify clear. Separate upper and lower; ensure the chamber is empty.
Sub-components: The assembly typically includes the forward assist body, pawl/rod, spring, and retaining roll pin.
Assemble: Slide the spring onto the pawl/rod, insert into the receiver’s forward-assist bore, and align the pin hole.
Pin in place: Drive the roll pin carefully, supporting the receiver ear to avoid marring.
Function check: Press the forward assist—feel positive spring return and verify pawl engagement on the carrier’s serrations.
Pro Tip: Lightly oil the bore and pawl, not the spring—excess oil can attract grit. If the assist feels sluggish, inspect for carbon buildup or a bent roll pin.
Compatibility Notes
Platform: AR-15 / M4 upper receivers
Assemblies: Fits standard forward assist bodies and pawls (mil-spec pattern)
Not for: AR-10/.308 forward assist assemblies that require different dimensions
Maintenance & Reliability
Inspect during routine cleanings for set, corrosion, or kinks; replace at the first sign of fatigue.
Keep the forward-assist channel clean and lightly lubed for smooth return and positive engagement.
Specifications
| Attribute | Detail |
|---|
| Product | AR-15 Forward Assist Spring |
| Model / SKU | UR-07 |
| Standard | Mil-spec tension and dimensions |
| Material | Heat-treated spring steel |
| Finish | Corrosion-resistant |
| Platform | AR-15 / M4 |
| Use | Replacement/repair/new build |
| UPC | 859819007867 |
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Small part, big reliability—refresh your forward assist with the UR-07 AR-15 Forward Assist Spring for crisp tension and dependable chambering in any environment.
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