Luth-AR AR-15 Carbine Buffer Spring
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Luth-AR
Overview
The Luth-Ar LLC AR-15 Carbine Buffer Spring is designed specifically for the AR-15 platform and features a carbine length that ensures optimal performance in your build. This spring plays a crucial role in the cycling of the action, providing the necessary tension to the buffer and helping to manage recoil by returning the bolt carrier group to battery smoothly. You'll often find this component in builds utilizing a carbine gas system, particularly those chambered in 5.56 NATO, where reliable function is essential.
Specifications
August 2026 on GunPartPicker
Luth-AR AR-15 Carbine Buffer Spring ranked #14 of the 58 buffer springs builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since March 2026. All time, it ranks #22 of the 97 buffer springs builders have added. Builds with this buffer spring are nearly all chambered in 5.56 NATO, split between carbine-length (50%) and mid-length (50%) gas systems, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today 7 of the 9 retailers we track have it in stock. The best price crept up from $4.69 to $4.94 over August 2026. Buying today, the lowest price is $4.69 at Palmetto State Armory, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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Frequently Built With
The part most often added in each category by the 12 builds that include this one
Expo Arms AR-15 Carbine Buffer With Red Bumper
Spike's Tactical AR-15 Lower - Forged Spartan - Stripped
CMMG AR-15 Bolt Catch
Leapers UTG PRO Mil-Spec 6-Position Receiver Extension Tube
LBE Unlimited AR-15 Takedown And Pivot Pin Set - ARTDPP
AR-15 Forged M4 Upper Receiver 5.56mm - AR-15 Forged M4 Stripped Upper Receiver
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all 4 →Builds in the community that include the Luth-Ar Llc Ar-15 Carbine Buffer Spring
| Build | Parts | Total |
|---|---|---|
 | 27 | $985.56 |
 | 28 | $1172.27 |
 | 27 | $2202.58 |
 | 21 | $664.13 |
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