Luth-AR MBA-3 AR-15 Stock w/ Buffer Assembly .223/5.56 Buffer - MBA-3K-M
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Luth-AR
Overview
The Luth-AR MBA-3 AR-15 Stock is an adjustable polymer stock designed to enhance your shooting experience with a customizable length of pull for improved comfort and accuracy. It comes equipped with a buffer assembly suitable for .223 and 5.56 calibers, making it a practical choice for a variety of builds. This stock is frequently found in builds utilizing a rifle gas system, particularly in configurations chambered for 5.56 NATO.
Specifications
Build history on GunPartPicker
Builders have been adding the Luth-AR MBA-3 AR-15 Stock w/ Buffer Assembly .223/5.56 Buffer - MBA-3K-M to their builds on GunPartPicker since February 2026. All time, it ranks #82 of the 446 stocks and braces builders have added. Builds with this stock are nearly all chambered in 5.56 NATO, nearly all on rifle-length gas, 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 5 of the 6 retailers we track have it in stock. The best price crept up from $178.99 to $199.99 over August 2026. Buying today, the lowest price is $174.79 at Optics Planet, 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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Read the guide: AR-15 Stock Popularity Report →Check it against the live catalog:
Frequently Built With
The part most often added in each category by the 13 builds that include this one
PSA Custom AR Trigger Single-Stage Flat Drop-In Match Grade - 116055
Wilson Combat AR-15 Lower Receiver Forged
Bravo Company M16 Bolt Carrier Group Black
Breek Arms AR-15 Warhammer MOD2 Ambidextrous Charging Handle Black
Hogue AR-15 OverMolded Pistol Grip - Beaver Tail - No Finger Grooves - Black
PSA 20" Rifle-Length 6.5 Grendel 1/8 Stainless Steel 15" Lightweight M-LOK Upper - With BCG & CH - 5165448709
Builds Featuring This Part
See all 1 →Builds in the community that include the Luth-AR MBA-3 AR-15 Stock w/ Buffer Assembly .223/5.56 Buffer - MBA-3K-M
| Build | Parts | Total |
|---|---|---|
 | 15 | $1023.82 |
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