The Q, LLC. Q-Sert Large Polymer Barricade Stop is a lightweight and durable accessory designed to improve the stability and control of your firearm. Made from high-quality polymer, this barricade stop provides a secure platform for shooting from barricades or other support structures. It is compatible with Q-Sert handguards and offers an affordable solution for shooters seeking enhanced performance and reliability. Q, LLC. Q-Sert Large Polymer Barricade Stop ACC-QSERT-BS-L