This Rite in the Rain all-weather zeroing target helps you zero your rifle optics in any weather Our thick, water-resistant 100# paper stock endures moisture and creates clean exit holes for easy evaluation of shot placement That paper strength also comes in handy to reduce situations in which large chunks are blown out of the target from closely-grouped rounds, making precise optic adjustment difficult The 9125 target is double-sided: one side applies to the M16A2 platform and the other side applies to the M4 platform Keep sharp year-round, no matter the weather, thanks to Rite in the Rain all-weather zeroing targets