B&T APC9 / APC9K / APC45 / APC10 TELESCOPIC PDW STOCK
B&T APC9 / APC9K / APC45 / APC10 Telescopic PDW Stock
So you want a factory B&T telescopic stock for your APC-series pistol caliber carbine. This is it. The genuine B&T telescopic PDW stock, model BT-20394, manufactured in Switzerland. Machined aluminum and high-strength polymer. Hydraulic buffer included. Fits APC9, APC9K, APC45, and APC40 platforms.
B&T APC9 / APC9K / APC45 / APC10 TELESCOPIC PDW STOCK This is the factory stock B&T supplies to military and law enforcement units worldwide. First, it bolts directly to your APC lower in place of the factory end-plate assembly, with no gunsmithing or modifications required. Next, the positive lock detent gives you discrete, repeatable positions every time. Finally, the integrated hydraulic buffer reduces felt recoil compared to running the platform without it.
Will this B&T APC9 / APC9K / APC45 / APC10 TELESCOPIC PDW STOCK fit my APC9K?
Yes, along with the APC9, APC45, and APC40. So this stock uses the standard B&T APC lower interface, shared across those platforms. Also, it bolts on directly without any permanent modifications. However, B&T recommends installation by a qualified, trained gunsmith, especially on an NFA-regulated SBR configuration. Therefore, confirm your specific APC variant before ordering, and plan for professional installation if you’re running an SBR.
How many positions does this stock adjust to?
Three discrete positions — collapsed, mid-length, and fully extended. So the collapsed position gives you the most compact profile for vehicle deployment or storage. Also, mid-length suits shooting with armor or kit. Finally, the fully extended position provides a conventional length of pull for standard shooting. Therefore, you get a practical adjustment range without infinite positions that require constant tweaking.
Does this B&T APC9 / APC9K / APC45 / APC10 TELESCOPIC PDW STOCK include a hydraulic buffer?
Yes, that’s a key part of the kit. So B&T’s hydraulic buffer is specifically designed to dampen felt recoil on the APC platform, which runs a straight-blowback operating system without traditional gas regulation. Also, the buffer works with the recoil spring assembly to smooth out the cycling impulse. Therefore, you get noticeably reduced felt recoil compared to running the platform with a standard non-hydraulic buffer setup.
Can I use this stock on an APC configured as a pistol?
B&T APC9 / APC9K / APC45 / APC10 TELESCOPIC PDW STOCK Only on an SBR-stamped APC. So any APC equipped with a shoulder stock is legally classified as a short-barreled rifle under NFA rules, requiring a Form 4 tax stamp and proper registration. Also, B&T sells a separate pistol brace conversion kit (BT-20548) for APC owners who want a brace rather than a stock. Therefore, if your APC is a pistol and you want to maintain that legal classification, source the brace kit instead of this stock.
Who is this B&T APC9 / APC9K / APC45 / APC10 TELESCOPIC PDW STOCK best for?
This B&T APC9 / APC9K / APC45 / APC10 TELESCOPIC PDW STOCK fits APC owners who have already registered their APC as an SBR and want the factory-correct shoulder stock configuration. So if you want genuine Swiss-made B&T engineering on your stock, matching the exact specification used by military and law enforcement units, this delivers that. Also good for APC owners upgrading from a folding brace who want a more stable shooting platform on a registered SBR.
Specs Table
| Spec | Detail |
|---|---|
| Part Number | BT-20394 |
| Compatibility | B&T APC9, APC9K, APC40, APC45, APC10 |
| Material | Machined aluminum, high-strength polymer, steel components |
| Color | Black |
| Weight | 19.75 oz |
| Length Adjustment | 7.09″ range across positions |
| Positions | 3 discrete positions (collapsed, mid-length, fully extended) |
| Buffer | Hydraulic buffer included |
| QD Sockets | Yes |
| Installation | Bolts directly to APC lower, no gunsmithing (professional install recommended) |
| NFA Note | Installing this stock on an APC pistol creates an SBR — NFA registration required |
| Origin | Switzerland, B&T factory production |
| Best For | APC SBR owners, military/LE-spec builds, recoil reduction |
| Price | $450 |
| Round Count Tested | verify |
FAQ
Will this B&T APC9 / APC9K / APC45 / APC10 TELESCOPIC PDW STOCK fit the APC9K specifically? Yes. This stock is compatible with the APC9K along with the APC9, APC40, and APC45, all using the same B&T APC lower interface.
Does installing this stock make my APC an SBR? Yes, if your APC is configured as a pistol. Adding a shoulder stock creates an SBR under NFA rules, requiring a Form 4 tax stamp.
Does this stock include a hydraulic buffer? Yes. The hydraulic buffer is part of this complete stock assembly.
Do I need a gunsmith to install this? B&T recommends professional installation by a qualified, trained gunsmith, though many describe it as straightforward.
What’s the weight of this stock? 19.75 ounces, confirmed from B&T and Capitol Armory specs.
Is there a pistol brace version available instead? Yes. B&T offers the BT-20548 pistol brace conversion kit for APC owners who want to maintain a pistol classification.
Is this the same stock supplied to military and law enforcement? Yes. This is the factory B&T military-grade stock as supplied to government customers worldwide.
Find more B&T APC accessories and Telescopic stocks at gunpartspalace.com.
