B&T Telescopic Stock for APC9 & APC45 - BT-20394

About this product

The B&T Telescopic Stock BT-20394 is a factory stock built for B&T's APC9 and APC45 pistol-caliber platform, adjustable across three fixed positions plus a fully collapsed setting. It replaces the stock that ships on rifle-length APC9/APC45 carbines, letting the shooter match length of pull to body armor, optics setup, or shooting stance without tools. Because it uses B&T's proprietary stock interface rather than a mil-spec buffer tube, it is built specifically for the APC9/APC45 family and will not drop onto AR- or MP5-pattern receivers without a separate adapter.

What does the BT-20394 do?

It lets the shooter shorten the carbine for close movement or extend it for a full cheek weld and sight picture, moving between three intermediate positions plus a closed length. The stock pulls straight out to extend, no lever needs to be pressed first, and it self-locks at the next detent rather than sliding freely. That lever-free, self-locking action is the main functional advantage over older push-button telescopic stocks, which are slower to run one-handed under stress.

How does it compare to a mil-spec AR buffer-tube stock?

A standard AR-15 collapsible stock rides on a round buffer tube and requires holding the release lever while sliding, with no positive lock between detents unless you land exactly on one. The BT-20394 mounts to B&T's own stock/receiver interface rather than a buffer tube, so the two are not interchangeable. In exchange for giving up that universal fit, the B&T design locks itself solidly at each of its three positions, which matters more in a compact PCC than on a full-size rifle.

What fits it?

The BT-20394 is sized for B&T's rifle-configured APC9 and APC45 carbines. It is not a universal accessory - B&T sells different stock and brace hardware depending on whether a given APC9/45 left the factory as a rifle or a pistol/brace configuration, so confirm your exact model before ordering. Any prior aftermarket stock swaps on the same gun should also be checked against B&T's current parts diagrams.

Does it work in California?

That depends on what the APC9/APC45 is built as before this stock goes on. On a rifle-configured APC9/45 with a 16-inch-plus barrel, adding this stock keeps the gun a standard semi-automatic carbine, subject to the same magazine-capacity and features rules as any other centerfire semi-auto sold in the state. Putting a rifle stock on a pistol- or brace-equipped APC9/45 with a barrel under 16 inches makes it a short-barreled rifle, and California Penal Code 33215 bans civilian possession of short-barreled rifles outright, with no state exception for a federally registered NFA stamp. Read our California gun laws page before ordering this stock for anything but an already rifle-length gun.

Who is this not for?

It is not for anyone hoping to add a rifle stock to a pistol-braced or short-barreled APC9/45 without going through the federal NFA process, and per the above, that configuration cannot legally be possessed in California even with a stamp. It also is not a fit for shooters who want one stock that swaps between multiple gun platforms, since it only mates to B&T's own interface.

Is it worth $620.99?

For an existing APC9 or APC45 owner who wants OEM-fit hardware and faster stock adjustment under pressure, yes - factory parts for this platform run expensive across the board, and the self-locking mechanism is a genuine improvement over lever-actuated designs. If you are pricing out a budget PCC build from scratch, this stock only makes sense once the base gun is already in hand.