Description
The Battle Arms Development Xiphos receiver set gives you a dedicated 9mm platform right out of the gate. Instead of trying to adapt a 5.56 lower to run pistol rounds, BAD built this one from scratch around blowback operation and small-frame Glock-style magazines. Both halves are precision CNC-machined from billet 7075-T6 aerospace aluminum, then hit with a MIL-A-8625 Type III hard anodized black finish that holds up to the kind of abuse a range gun sees. The matched upper and lower share the same lines and signature notch cut, so the whole thing looks like it was meant to go together, because it was.
What Sets the Xiphos Set Apart
The standout here is how much weight BAD carved out without giving up strength. The lower uses skeletonized geometry and relief cuts placed exactly where the material isn't doing structural work, which keeps the build light for hauling around all day at a match or in the field. You get a flared magazine well for faster reloads, an integrated trigger guard, and an upper tension screw to snug up the fit between the two receivers. It's cut for standard TDP/mil-spec AR fire control parts, so your favorite trigger, safety, and small parts drop right in. The safety selector area is machined with a relief cut for BAD's own short-throw ambidextrous safety selectors if you want to run those.
Building on the Xiphos Lower
Since it feeds from small-frame Glock magazines, you're looking at some of the cheapest and most available pistol-caliber mags out there, which makes range days a lot easier on the wallet. This is a blowback design, so keep in mind it is not compatible with CMMG-style delayed blowback systems that use AR-pattern magazines and bolt carriers. The upper runs a minimalist billet design with a full-length Picatinny top rail and no forward assist, which suits a clean pistol-caliber build. Pair it with a 9mm bolt carrier, buffer, barrel, and a Glock mag, and you've got the bones of a serious AR-9. Backed by Battle Arms Development's limited lifetime warranty against manufacturing defects, this set is a strong starting point for anyone building a 9mm PCC, subgun, or AR pistol.
Key Specifications
- Manufacturer: Battle Arms Development
- Manufacturer Part Number: XIPHOS-SET-BLK
- UPC: 810033782220
- Caliber: 9mm Luger
- Material: Billet 7075-T6 Aerospace Aluminum
- Finish: MIL-A-8625 Type III Hard Anodized Black
- Magazine Compatibility: Small-Frame Glock-Style 9mm Magazines
- Operation: Direct Blowback
- Fire Control Compatibility: TDP / Mil-Spec AR Lower Parts
- Top Rail: Full-Length Picatinny
- Configuration: Matched Upper and Lower Receiver Set
- Platform: AR-9 PCC / Pistol
What’s Included
- Xiphos billet 9mm upper receiver
- Xiphos billet 9mm lower receiver
Frequently Asked Questions
What magazines does the Xiphos 9mm receiver set use?
The Xiphos lower is machined to feed from small-frame Glock-style 9mm magazines. That gives you access to some of the most affordable and widely available pistol-caliber mags on the market, which keeps range time cheap. Standard Glock 17 and 19 style magazines and their many aftermarket clones are the go-to here.
Will standard AR-15 fire control parts fit the Xiphos lower?
Yes. The Xiphos lower is cut for TDP and mil-spec AR lower parts, so your usual trigger, hammer, safety, and small parts kit will drop right in. It's also machined with a relief cut for Battle Arms Development's short-throw ambidextrous safety selectors if you want to run one.
Is the Xiphos set compatible with delayed blowback systems?
No. The Xiphos is designed as a direct blowback 9mm platform and is not compatible with CMMG-style delayed blowback systems that use AR-pattern magazines and bolt carrier groups. Plan your build around a standard 9mm blowback bolt carrier, buffer, and Glock-mag setup.
What do I still need to finish an AR-9 build on the Xiphos set?
You're getting the matched upper and lower receivers, so you'll still need a 9mm barrel, blowback bolt carrier group, buffer and spring, charging handle, a lower parts kit, a handguard, and a stock or brace. Add a Glock-style magazine and you've got a complete pistol-caliber build. It's a great foundation for a custom AR-9 PCC or pistol.





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