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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
Strike Industries Extended Bolt Catch
Bolt Catch
Law Tactical AR Folding Stock Adapter Gen 3 - HK
Stock Adapter
Timber Creek Outdoors Ambidextrous Safety Selector - Black
Safety
Bravo Company Ar-15/m16 Bcm Mil-Spec 6 Position Receiver Extension
Strike Industries Cobra Billet Aluminum Trigger Guard - Red
Trigger Guard
Strike Industries AR-10 Shift Pins, Black - SI-AR10-SHIFT-BK
Takedown PinAggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| Strike Industries Extended Bolt Catch | Bolt Catch | 24 |
| Law Tactical AR Folding Stock Adapter Gen 3 - HK | Stock Adapter | 23 |
| Timber Creek Outdoors Ambidextrous Safety Selector - Black | Safety | 19 |
| Bravo Company Ar-15/m16 Bcm Mil-Spec 6 Position Receiver Extension | 19 | |
| Strike Industries Cobra Billet Aluminum Trigger Guard - Red | Trigger Guard | 18 |
| Strike Industries AR-10 Shift Pins, Black - SI-AR10-SHIFT-BK | Takedown Pin | 18 |
| Platform | Percentage |
|---|---|
| AR-15 | 81.2% |
| AR-10 | 15.3% |
| AR-9 | 3.5% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 66.7% |
| .223 Wylde | 13.6% |
| 300 Blackout | 6.1% |
| .450 Bushmaster | 4.5% |
| .308 Win | 4.5% |
| 7.62x39mm | 1.5% |
| .458 SOCOM | 1.5% |
| 6.5 Grendel | 1.5% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 44.6% |
| Carbine | 30.4% |
| Rifle | 16.1% |
| Pistol | 8.9% |
Builds in the community that include the Expo Arms Ar-15 Carbine Buffer Spring - 17-7 Steel
| Build | Parts | Total |
|---|---|---|
 | 17 | $1451.28 |
 | 22 | $1018.93 |
 | 28 | $1896.75 |
| 32 | $3897.56 |
 | 26 | $1114.95 |
 | 25 | $2509.50 |
 | 32 | $3897.56 |
 | 19 | $3413.09 |
 | 27 | $2007.47 |
 | 30 | $3996.05 |
| 29 | $3756.08 |
 | 18 | $520.58 |
4 global ratings
Expo Arms 17-7 steel carbine buffer spring works as well as any other carbine spring Ive used. The 17-7 steel resists fatigue compared to plain music wire springs. Compared next to my Aero spring the color of the steel is slightly different. Function is identical.
Expo Arms 17-7 stainless carbine buffer spring would buy again. Quieter cycle than a music wire spring. Dimensions match milspec for any carbine extension. Resists fatigue over thousands of rounds. Cheap quality of life upgrade.
Expo Arms 17-7 stainless steel carbine buffer spring is a small but real upgrade over a music wire spring. Less spring twang through the stock. 17-7 stainless resists fatigue. Dimensions match milspec carbine springs.
Expo Arms 17-7 stainless steel carbine buffer spring is a real upgrade over a music wire spring. Less spring twang felt through the stock. Dimensions match milspec for any carbine extension. Resists fatigue. Cheap quality of life upgrade.
