Century Arms AP5-SD Bundle: F5 Stock & Cyberarm Light Brace

Buy an AP5 on its own and you already know what happens next. You spend the following three months chasing a stock and a brace that actually fit. This Century Arms AP5 bundle skips that. We paired the pistol with the F5 MFG parts most AP5 owners end up buying anyway — so you build it once and shoot it.

The Century Arms AP5-SD

The AP5-SD is a roller-delayed blowback 9mm built by MKE in Turkey, the same plant that has produced HK-licensed designs for decades. It channels the classic MP5SD with a shrouded handguard and a removable faux suppressor riding on a 5.75″ cold hammer-forged, 1/2×28-threaded barrel with a 3-lug adapter underneath — suppressor-ready the moment you want to run a real can. It carries a Navy-style grip assembly, an ambidextrous selector, and a claw-mounted 1913 Picatinny rail over fixed front and fully adjustable rear sights. The action is smooth, the recoil impulse is flat, and the aftermarket is enormous because it takes standard MP5 parts. Century ships this one with two 30-round magazines, a sling, a cleaning kit, and a hard case.

F5-ACR Gen 3 Stock: Fold It, Lock It, Shoot It

The F5-ACR Gen 3 is CNC-machined from billet 6061 on 5-axis equipment, so there’s no wobble at the hinge. It folds left, locks in both positions, and telescopes through seven positions for an 11″ to 14″ length of pull.

The Gen 3 upgrade is the fully adjustable cheek piece. If you run a red dot, a magnifier, or night vision, you can finally get a repeatable cheek weld instead of chin-welding the receiver. Backed by the F5 MFG lifetime guarantee.

Cyberarm Light Brace: Control Without the Weight — or the Paperwork

The Cyberarm Light is a fully aluminum stabilizing brace built for shooters who found the standard Cyberarm too much on the front of a pistol. It sheds a significant amount of weight without giving up the rigid, no-wobble feel — no floppy rubber fin here either. It shares the same F5-ACR chassis as the stock, which means one chassis, two configurations. Run the brace on your pistol today. Swap to the stock later if you decide to file a Form 1.

What’s in the Box

• Century Arms AP5-SD pistol, 9mm, with faux suppressor — plus two 30-round mags, sling, cleaning kit, and hard case
• F5 MFG F5-ACR Gen 3 stock with adjustable cheek piece (MP5 adapter included)
• F5 MFG Cyberarm Light aluminum brace

Compliance — Read This First
Important: attaching the stock to a pistol-configured AP5 creates a short-barreled rifle under the NFA. Register the host on an approved ATF Form 1 before you install the stock, or keep the stock boxed and run the Cyberarm Light brace. Magazine capacity and firearm transfers are subject to state and local law — the AP5 ships to your FFL.