Submited By: Justin C. on 01/14/2009 This fits well on my KWA M16A4 with an Echo launcher, nice addition to any gun. as for the external build its made from ABS fiber plastic and sheet metal on the inside, the quality is topnotch and it required no modification for it to fit. as for the previous "reviews" try asking questions on the forum not here, and for reference this only fits on the M-16 variants not the M4. | |