The Magpul BSL stabilizing brace (brand part number MAG1143-BLK) is an arm brace built to improve single-handed control of a large-format AR-pattern pistol. Made in the USA by Magpul Industries, the BSL fits standard mil-spec carbine receiver extension tubes, which are sold separately and not included with the brace. An integrated QD sling cup and two M-LOK compatible slots give you ambidextrous sling mounting options, letting you apply stabilizing sling tension for noticeably better one-handed control. The adjustment mechanism is simplified and durable, keeping the brace easy to operate under stress. Finished in black, it brings Magpul’s familiar build quality to a large-format pistol setup.

Key Specifications

• Compatible with mil-spec carbine receiver extension tubes (tube not included, sold separately).
• Simplified, durable adjustment mechanism.
• Integrated QD sling cup.
• Two M-LOK compatible slots for ambidextrous sling mounting.
• Enables stabilizing sling tension for better single-handed control.
• Designed to improve single-handed employment of large-format pistols.
• Made in the USA.
• Black finish.

Frequently Asked Questions

Is the receiver extension tube included? No, the mil-spec tube is sold separately.

How does this help single-handed control? An integrated QD cup and two M-LOK slots let you apply stabilizing sling tension for better one-handed control.

What is this brace made for? Large-format AR-pattern pistols.

Buy the Magpul BSL Stabilizing Arm Brace, Black

Order this Magpul brace from our Lubbock, Texas gun shop for fast, direct shipping right to your door. Browse more AR braces and stocks from Schaefer Defense to improve control of your pistol build.