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Daniel Defense
Overview
The Daniel Defense Collapsible Mil-Spec Buttstock is designed to provide adjustable length of pull for a more customized shooting experience. Its Mil-Spec tube compatibility ensures a secure fit with standard AR-15 lower receivers, allowing for reliable performance and ease of use. This buttstock is commonly found in builds featuring a mid-length gas system and chambered in 5.56 NATO, making it a fitting choice for those looking to enhance their firearm's versatility.
Daniel Defense Collapsible Mil-Spec Buttstock, Brown - 21-091-04179-011
Daniel Defense Collapsible Mil-Spec Buttstock, Brown - 21-091-04179-011 was the second most added stock on GunPartPicker in August 2026, behind the Magpul AR-15 MOE Stock Collapsible Mil-Spec Black, with about 10% of all stocks and braces added to builds. That's its 4th straight month at #2. Builds with this stock are mostly chambered in 5.56 NATO (72%, then .223 Wylde 9%), split between mid-length (58%) and carbine-length (24%) gas systems, and mostly AR-15 (85%, then AR-10 11%).
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today 6 of the 8 retailers we track have it in stock. It dipped to $69.70 at Brownells for a stretch in August 2026, well under its usual $82 to $84, so sales do come around. Buying today, the lowest price is $82 at BattleHawk Armory, above August's low of $69.70, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
We ranked every stock & brace by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Stock Popularity Report →The part most often added in each category by the 878 builds that include this one
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Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Daniel Defense Collapsible Mil-Spec Buttstock, Brown - 21-091-04179-011
| Build | Parts | Total |
|---|---|---|
 | 18 | $1205.86 |
 | 22 | $2266.75 |
 | 24 | $3253.62 |
 | 16 | $1843.55 |
 | 31 | $7458.30 |
| 27 | $4253.00 |
 | 23 | $1976.32 |
 | 15 | $3945.14 |
| 28 | $1935.54 |
 | 14 | $5026.85 |
 | 22 | $1697.62 |
 | 15 | $1214.43 |
5 global ratings
Top reviews
Daniel Defense collapsible stock in brown has the rubber butt pad that holds a shouldering position well. Brown anodize matches their brown handguards. Stock detent locks positively at each position. Both side QD sockets work.
Daniel Defense collapsible stock in brown is lightweight feeling on the rifle. Rubber butt pad grips shoulders well. Stock locks tight at each position. QD points on both sides. Brown matches DD's other brown parts.
Daniel Defense collapsible stock in their brown shade matches their other brown finished parts. Stock locks into each position firmly, no wobble on the buffer tube. Both QD points are functional.
feels solid
Daniel Defense collapsible stock in brown has the rubber butt pad that grips a plate carrier or jacket. Stock locks tight on a milspec carbine tube. QD socket on both sides. Brown color matches their other DD brown parts.
