Designed for steady, repeatable performance in varied environments, the Banish Suppressors Banish 5968 Fixed Barrel Spacer Banish 45 emphasizes functional reliability and straightforward operation. This Fixed Barrel Spacer allows for more flexibility when using the BANISH 45. It replaces the spring inside the Nielsen device in the BANISH 45 and should only be used on fixed barrel firearms, commonly used on hosts such as pistol caliber carbines and subguns like Sig MPX, CZ Scorpion, and Kriss Vector. Banish Suppressors is known for its innovative designs and commitment to quality.