Heavy-Duty bore mop is designed to specifically for maintaining both 37/40mm gas and grenade launchers. Highly absorbent cotton is ideal for a quick swab clean of bore or applying CLP to a fouled bore or applying (LP Lubricant/Preservative) lubricants after cleaning is complete.
 
Features:
100% Highly Absorbent Cotton
Mop Replacement for Gas/Grenade Cleaning System #GL40 / LL-1305
American Std. #5/16-27 Threads
Made in USA