This Rite in the Rain All-Weather Zeroing Target helps you zero your rifle optics in any weather. Our thick, water-resistant 100-lb paper stock repels moisture and creates clean, crisp bullet holes for reading shot placement. The paper strength also reduces instances where closely grouped shots blow out chunks of the target and make it difficult to read groups. The 25 meter target is double-sided: one side applies to the M16A2 platform and the other side applies to the M4 platform.