GMG 5.5" AR15 Slip-On Faux Suppressor, GM-ARFS5.5: * Easy to install * Fits all AR15/M4 barrels in .223 * Back threaded to thread on over the barrel * Gives the barrel an extension of 7" * Rugged CNC machined 6061 aluminum * Adds weight and balance steadiness to the barrel * Gives the professional look of the real thing * Can be used as a display or fired through