NEW GEN 4 GLOCK ARMORERS BENCH MAT 17 19 20 21 22 23 26 27 29 30 31 32 34 35 36. For Glock GEN 4 Cerus Gear PRO Armorers Cleaning Bench Mat. For Glock GEN 4. •Lightweight, heavy duty cleaning mats are the perfect addition to your armorer’s bench.