Expo Arms AR-15 Carbine Buffer Spring - 17-7 Steel
Click to see full view
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.
Specifications
Available Merchants(1)
Prices checked
Price Alert
September 2026 on GunPartPicker
Expo Arms AR-15 Carbine Buffer Spring - 17-7 Steel was the seventh most added buffer spring on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since January 2026. All time, it is the eighth most added buffer spring on the site. Builds with this buffer spring are mostly chambered in 5.56 NATO (73%, then .223 Wylde 10%), split between mid-length (50%) and carbine-length (24%) gas systems, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today the one retailer we track has it in stock. Prices barely moved in September 2026, holding around $5.95, so there haven't been real sales lately. Buying today, the lowest price is $5.99 at Primary Arms, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
Not sure which buffer spring to pick?
We ranked every buffer spring by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Buffer Spring Guide →Check it against the live catalog:
Frequently Built With
The part most often added in each category by hundreds of builds that include this one
Aero Precision Stripped M4E1 AR-15 Lower Receiver - Special Edition - Freedom
CMMG AR-15 HD Pivot and Takedown Pin Parts KIT - 55AFF3B
ALG Defense Qms AR-15 Trigger Set
Geissele Automatics Super 42 Braided Buffer Spring and H2 Buffer
Rise Armament AR-15 Magazine Release Button - Rise Red
Timber Creek Outdoors Ambidextrous Safety Selector - Black
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all builds →Builds in the community that include the Expo Arms Ar-15 Carbine Buffer Spring - 17-7 Steel
| Build | Parts | Total |
|---|---|---|
 | 17 | $1448.47 |
 | 22 | $1032.36 |
 | 28 | $2047.45 |
| 32 | $4063.32 |
 | 26 | $1230.62 |
 | 25 | $2491.98 |
 | 32 | $4063.32 |
 | 19 | $3329.43 |
 | 27 | $2101.90 |
 | 30 | $4082.92 |
| 29 | $3842.95 |
 | 18 | $617.10 |
No reviews yet. Be the first to review this product!