Modified dimensions allow for wider compatibility with non Colt-spec platforms. Constant-curve internal geometry for smooth feeding. Anti-tilt, self-lubricating follower for increased reliability. Long life USGI-spec stainless steel spring. Over-travel insertion stop on the spine. Ribbed gripping surface and new aggressive front and rear texture for positive magazine handling. Paint pen dot matrix panels on the bottom of the body to allow for identification marking. Flared floorplate aids magazine handling and disassembly yet is slim enough for use with many double and triple pouches. Pop-off Impact/Dust Cover to minimize debris intrusion and for additional protection in storage and transit