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Expo Arms
Overview
The Expo Arms AR-15 Carbine Buffer Spring is designed specifically for the AR-15 platform, featuring a carbine length that ensures optimal performance in your firearm. Constructed from durable 17-7 steel, this buffer spring enhances the cycling of your action, helping to reduce felt recoil and improve reliability during operation. This spring is commonly used in builds with a mid-length gas system, particularly those chambered in 5.56 NATO, providing a balanced shooting experience.
Based on build data

Law Tactical AR Folding Stock Adapter Gen 3 - HK
Stock Adapter
Strike Industries Extended Bolt Catch
Bolt Catch
Timber Creek Outdoors Ambidextrous Safety Selector - Black
Safety
Strike Industries Cobra Billet Aluminum Trigger Guard - Red
Trigger Guard
Strike Industries AR-10 Shift Pins, Black - SI-AR10-SHIFT-BK
Takedown Pin
Strike Industries AR Enhanced Castle Nut & Extended QD End Plate, Black - SI-AR-ECN&EEP-BK
End PlateAggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| Law Tactical AR Folding Stock Adapter Gen 3 - HK | Stock Adapter | 24 |
| Strike Industries Extended Bolt Catch | Bolt Catch | 24 |
| Timber Creek Outdoors Ambidextrous Safety Selector - Black | Safety | 19 |
| Strike Industries Cobra Billet Aluminum Trigger Guard - Red | Trigger Guard | 19 |
| Strike Industries AR-10 Shift Pins, Black - SI-AR10-SHIFT-BK | Takedown Pin | 18 |
| Strike Industries AR Enhanced Castle Nut & Extended QD End Plate, Black - SI-AR-ECN&EEP-BK | End Plate | 18 |
| Platform | Percentage |
|---|---|
| AR-15 | 81.4% |
| AR-10 | 15.1% |
| AR-9 | 3.5% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 64.6% |
| .223 Wylde | 15.4% |
| 300 Blackout | 6.2% |
| .450 Bushmaster | 4.6% |
| .308 Win | 4.6% |
| 7.62x39mm | 1.5% |
| .458 SOCOM | 1.5% |
| 6.5 Grendel | 1.5% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 45.6% |
| Carbine | 29.8% |
| Rifle | 15.8% |
| Pistol | 8.8% |
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