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Brownells
Overview
The Brownells M4 Buttstock in black is a collapsible stock designed to fit Mil-Spec buffer tubes, providing flexibility in length for various shooting applications. Made from durable polymer, this stock delivers a lightweight yet sturdy option for your AR-15 build, enhancing overall ergonomics and comfort during use. This buttstock is frequently found in builds utilizing a Mid-Length gas system chambered in .223 Wylde, making it a practical choice for versatile shooting scenarios.
Specifications
Available Merchants(1)
Prices checked
Price Alert
October 2026 on GunPartPicker
Brownells M4 Buttstock Black ranked #108 of the 245 stocks and braces builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it ranks #74 of the 559 stocks and braces builders have added. Builds with this stock are mostly chambered in 5.56 NATO (64%, then .223 Wylde 29%), split between mid-length (54%) and carbine-length (23%) gas systems, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today the one retailer we track has it in stock. Prices barely moved in October 2026, holding around $15.99, with no real sale all month. Buying today, the lowest price is $15.99 at Brownells, which matches the best price we saw in October.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by the builds that include this one
Wilson Combat AR-15 Lower Receiver Forged
PSA 16" Mid-Length 5.56 NATO 1:7 Nitride 13" Lightweight Hex M-LOK Upper No BCG or CH
Expo Arms Standard AR-15 Charging Handle
LBE Unlimited AR-15 A2 Pistol Grip, Black - ARGRP
LBE Unlimited AR-15 Magazine Catch Assembly, Black - ARMCASY
LBE Unlimited AR-15 Mil-Spec Fire Control Group, Black - ARTRGRP
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use 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 Brownells M4 Buttstock Black
| Build | Parts | Total |
|---|---|---|
| Combat ar-15 | 16 | $548.65 |
 | 21 | $807.51 |
 | 14 | $965.68 |
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