Next-generation impact and crush resistant polymer construction; Modified dimensions allow for wider compatibility with non Colt-spec 'STANAG 4179' platforms; Constant-curve internal geometry for smooth feeding; Anti-tilt, self-lubricating follower for increased reliability; Long life USGI-spec stainless steel spring, black-oxide coated (MIL-DTL-13924D); 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 ammunition protection in storage and transit