CA Compliance:
California compliance
- Status: Legal to own in California.
- Configuration: Fixed magazine (CompMag), installed by WBT. The CompMag is a fixed 10-round magazine that stays in the rifle and loads one round at a time from the side through a loading port, so the rifle keeps its pistol grip, stock and muzzle device and is never opened to reload. It fits most rifles that take a standard AR-15, AR-10 or AK-47 magazine.
- Magazine: 10-round CompMag, fixed in place; loads from the side.
- Your options: If this page shows a compliance selector, choose the build you prefer and we configure it that way. If not, this is the configuration we offer by default; on AR-pattern rifles and some AKs a different build is often possible, so ask us before you order.
- Learn more: How fixed-magazine rifles work · How featureless rifles work · Why some rifles can only be built one way
About this rifle
The Aero Precision M4E1 PRO is an AR-15 platform rifle chambered in .223/5.56 with a 16" barrel and a 10-round capacity. Finish: Black. WBT configures it for California at our Yuma, Arizona warehouse before it ships.
Manufacturer details
The Aero Precision M4E1 PRO rifle was built for the end user. A seamless integration of ambidextrous controls paired with robust componentry brings the M4E1 PRO Rifle into a class of its own within the M4E1 lineup. The M4E1 PRO Lower Receiver features a mirrored set of controls, allowing for both convenient and intuitive manipulation of the ambidextrous safety, magazine release, and bolt catch.
- 16" Cold Hammer Forged BA Gov 5.56 Barrel - Chrome Lined
- 15" MOD 4 Handguard
- Mid Length Gas System, Pinned Low Profile Gas Block
- AR15 A2 Birdcage Flash Hider
- Magpul MOE Grip
- Magpul MOE SL Stock
- Anodized Black Finish
Specifications
- Brand: Aero Precision
- Caliber: .223/5.56
- Action: Semi-Automatic
- Capacity: 10
- Barrel: 16 in
- Finish / color: Black
- California compliance: Fixed Magazine – CompMag
- Manufacturer part #: APCR640449
- UPC: 840014623129
Buying from WBT Guns
- Delivery: Free pickup at our La Mesa store with no transfer fee, or shipment to any California gun store you choose. Select your FFL at checkout.
- Compliance guarantee: Every firearm leaves our shop in the configuration described on this page, function-checked by our compliance team.
- Payment: Pay in full, put 50% down with the balance due in 14 days, or finance with Credova.
- Paperwork: Firearm Safety Certificate, DROS and California's 10-day waiting period apply. We handle each step with you at pickup.
- Questions: Call (619) 667-9453 or email sales@wbtguns.com. FAQ · California Rifle Compliance Guide
WBT Guns is family-owned in La Mesa, California, and has configured firearms for California buyers since 2012.
A note on accuracy. We work hard to keep every listing correct, but specifications, images and compliance details come from many sources and can contain errors or change without notice. Images may show a configuration that is not California-legal. If a detail on this page matters to your decision, call us and we will confirm it against the actual firearm before you order. The compliance information here is general in nature and is not legal advice; California and local laws change, and the configuration described is confirmed at the time of sale. All sales are subject to applicable federal, state and local law and to the buyer's eligibility to purchase.
