The LWRC IC-9 SBR 9mm is a black pistol caliber AR with an 8.5-inch barrel, built from the ground up around OEM Glock magazines (LWRC part no. ICR9B8S). Instead of a piston or plain blowback, it runs LWRCI’s chamber ring delayed blowback operating system. The MonoForge upper receiver with an integrated rail base is lighter and stronger than a standard-pattern upper, and the forgings are coined for precise dimensions. LWRCI carries over the fully ambidextrous controls from its gas-piston rifles, along with a 6-inch M-LOK rail up front. At 5.1 pounds and 22.5 inches collapsed, it is a compact 9mm carbine that shares magazines with a Glock pistol.

Key Specifications

• The chambering is 9mm, a mild-recoiling cartridge with plentiful ammunition.
• Barrel length is 8.5 inches, which keeps the rifle short enough for vehicle and close-quarters use.
• Rifling is 1:10 right-hand twist, a common rate for 9mm bullet weights.
• Muzzle threads are 1/2×28 TPI, the standard 9mm pitch for muzzle devices and suppressors.
• The operating system is chamber ring delayed blowback, which LWRCI says gives the IC-9 its distinct shooting experience.
• It feeds from OEM Glock magazines, so magazines are shared with a Glock 9mm pistol.
• Overall length is 22.5 to 25.75 inches, depending on stock position.
• Weight is 5.1 pounds, light enough to carry and shoot through long sessions.
• The handguard is a 6-inch M-LOK rail, with slots for a light or a forward grip.
• The trigger is the LWRCI Enhanced Fire Control Group, Nickel Teflon coated for a smooth, crisp pull with positive reset.

Frequently Asked Questions

Which magazines does the IC-9 SBR use? It was designed around US-made OEM Glock 9mm magazines, and LWRCI lists 33-round and 10-round sizes for the IC-9.

Which controls are ambidextrous? The fire and safety control, bolt catch release, magazine release and charging handle are all ambidextrous, and an oversized trigger guard leaves room for gloved hands.

Do I need ATF approval to buy this? No. As of October 9, 2026, ATF no longer requires Form 4 approval, registration or a tax stamp for short-barreled rifles. It transfers on a Form 4473 with a background check through a Class 3 (SOT) dealer. State and local laws still apply. Taking an SBR across state lines still requires an approved ATF Form 5320.20.

Buy the LWRC IC-9 SBR 9mm, 8.5-Inch Barrel, Black

As of October 9, 2026, this short-barreled rifle transfers on a Form 4473 with a background check at your Class 3 (SOT) dealer, with no Form 4 or tax stamp; state and local laws still apply. Order through LWRC‘s short-barreled rifles lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer.