Luth-AR AR-308 Rifle Buffer Spring
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Luth-AR
Overview
The Luth-Ar LLC AR-308 Rifle Buffer Spring is designed specifically for the AR-10 platform, offering a reliable solution for recoil management. With its rifle-length configuration, this spring ensures optimal function and cycling of the action, making it a critical component for anyone building an AR-10. You will often find this buffer spring in builds utilizing a mid-length gas system and chambered in 5.56 NATO, providing smooth operation and consistency.
Specifications
August 2026 on GunPartPicker
Luth-AR AR-308 Rifle Buffer Spring was the seventh most added buffer spring on GunPartPicker in August 2026, behind the Expo Arms AR-15 Carbine Buffer Spring - 17-7 Steel, with about 3% of all buffer springs added to builds. Down from #6 in May, June and July. Builds with this buffer spring are mostly chambered in .308 Win (60%, then 5.56 NATO 40%), split between carbine-length (50%) and mid-length (50%) gas systems, and split between AR-10 (50%) and AR-15 (50%).
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today 7 of the 8 retailers we track have it in stock. The best price crept up from $5.24 to $7.04 over August 2026. Buying today, the lowest price is $6.57 at KY Gun Company, above August's low of $5.24, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
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Read the guide: AR-15 Buffer Spring Guide →Frequently Built With
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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 2 →Builds in the community that include the Luth-Ar Llc Ar-308 Rifle Buffer Spring
| Build | Parts | Total |
|---|---|---|
 | 30 | $3616.59 |
 | 30 | $3616.59 |
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