If you're looking for the ultimate versatility in an indoor to mid-range M4 AEG, stop right there! Here it is. This is it. The Elite Force M4 CQB is not "just another M4" as many might think. For example, how about reinforced internal parts or redesigned external furniture like the 6-position crane stock with a unique simple-access battery compartment? Not only does our M4 CQB come with a micro-switch trigger inside for snappy trigger response, but we have optimized the rifle's velocity for maximum CQB performance without exceeding most standard indoor field velocity limits. This particular model has gone through seven (yes, 7) generations of improvements both inside and out. We care about the shooting experience of our customers and as a way of demonstrating that, we listen to feedback, review and revise, test and retest, ultimately creating a better product so that you can enjoy a better class of airsoft products. We also back our work with a 60-day replacement warranty just in case. Buy with confidence, shoot with pride.