WISE ARMS WA-15B 300BLK GRY 10.5″ SBA3

Description

The WISE ARMS WA-15B 300BLK GRY 10.5″ SBA3 is a factory-built AR pistol chambered in .300 Blackout, featuring a 10.5-inch barrel and an SB Tactical SBA3 stabilizing brace. It ships with a single 30-round magazine and a hard case, ready for home defense, truck gun roles, or suppressed shooting.

Specification	Detail
Manufacturer	Wise Arms (per manufacturer specs)
Model	WA-15B 300BLK GRY 10.5″ SBA3
Material	7075-T6 aluminum upper/lower receiver, steel barrel
Compatibility	Standard AR-15 lower parts, .300 BLK magazines
Finish	Gray Cerakote
Weight	6.2 lbs (empty, per manufacturer specs)
Condition	New

Key Features

• 10.5-inch barrel (1:8 twist): Why it matters — this twist rate stabilizes both subsonic and supersonic .300 BLK loads, giving you reliable expansion from 110-grain supers to 220-grain subs.
• SB Tactical SBA3 brace: Why it matters — the adjustable arm and rubber buttpad provide a cheek weld that mimics a carbine stock, improving control during rapid fire without NFA paperwork.
• Gray Cerakote finish: Why it matters — corrosion-resistant coating stands up to sweat, rain, and carbon fouling, and the gray color reduces glare in low-light shooting.
• Mil-spec trigger assembly: Why it matters — a clean, predictable break at 5.5-6.5 lbs keeps the gun reliable for defensive use while allowing easy upgrades to a Geissele or Timney trigger later.
• Free-float M-Lok handguard: Why it matters — keeps barrel harmonics consistent for accuracy and lets you mount lights, lasers, or grips without affecting zero.

Who It’s For

This build is for shooters who want a compact .300 Blackout pistol for home defense, truck carry, or hunting hogs inside 150 yards. It works well for those who already own an AR-15 lower and want a complete upper package, or for first-time AR pistol buyers who need a ready-to-go gun.

Pros / Cons

• Pro: Factory-built with an SBA3 brace — no need to file a Form 1 or wait for a stamp.
• Pro: 1:8 twist handles both subsonic and supersonic ammo without keyholing.
• Con: Mil-spec trigger is serviceable but not match-grade — budget for a trigger upgrade if you want a lighter pull.
• Con: 10.5-inch barrel loses some velocity compared to 16-inch .300 BLK rifles — you may see 50-100 fps drop with supers.

Comparison: Wise Arms WA-15B vs. Zev Technologies vs. Agency Arms

Feature	Wise Arms WA-15B	Zev Technologies AR Pistol	Agency Arms AR Pistol
Barrel length	10.5”	10.5”	10.5”
Twist rate	1:8	1:7	1:7
Brace	SB Tactical SBA3	SB Tactical SBA4	SB Tactical SBA3
Finish	Gray Cerakote	Black anodized	Black anodized
Price	$729.67	$1,899	$2,400
Trigger	Mil-spec	Zev adjustable	Agency match
Handguard	M-Lok free-float	M-Lok free-float	M-Lok free-float

The Wise Arms WA-15B costs about $1,200 less than a Zev and $1,670 less than an Agency Arms build. You get a functional, accurate .300 BLK pistol with the same brace and barrel length as the premium options — the trade-off is a standard trigger and no match-grade barrel.

Skip the video section — this product is ready to ship.

FAQ

Does the Wise Arms WA-15B come with a magazine?

Yes, it ships with one 30-round magazine. The manufacturer includes a Magpul PMAG or equivalent gen3 .300 BLK magazine.

What twist rate is the barrel?

It is a 1:8 twist, per manufacturer specs. This stabilizes both 110-grain supers and 220-grain subs reliably.

Is the brace adjustable?

Yes, the SB Tactical SBA3 has an adjustable arm with six positions, plus a split-fix compatible buttpad for a custom length of pull.

Can I suppress this pistol?

Yes. The 10.5-inch barrel is threaded 5/8×24, standard for .300 BLK. Use a direct-thread or QD suppressor rated for .30 caliber.

What is the weight of the Wise Arms WA-15B?

Empty weight is 6.2 lbs per manufacturer specs. Loaded with a 30-round magazine, expect about 7.5 lbs.

✅ Nationwide delivery (all 50 states)
✅ Ships 1-2 business days
✅ 30-day returns
✅ Secure checkout

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Last updated: April 2026